diff --git a/DeepDrftAPI/CLAUDE.md b/DeepDrftAPI/CLAUDE.md
index 840a58d..b0738f9 100644
--- a/DeepDrftAPI/CLAUDE.md
+++ b/DeepDrftAPI/CLAUDE.md
@@ -220,19 +220,19 @@ Paged release list, optionally filtered to one medium. Public browse data, same
   - `sortDescending` (bool, optional, default false): sort direction.
 - Returns 200 with `PagedResult<ReleaseDto>` on success. Returns 400 if `medium` is unrecognized. Returns 500 on query error.
 
-### GET api/release/{id:long} (unauthenticated)
+### GET api/release/{entryKey} (unauthenticated)
 
-Single release with both metadata navs (nulls for non-matching media). Public, same auth posture as `GET api/release`.
+Single release with both metadata navs (nulls for non-matching media). Public, same auth posture as `GET api/release`. Addresses releases by their opaque public `EntryKey` (GUID string), never the int PK (Phase 11 §3e).
 
-- **Route parameter `id`** (long): the SQL release ID.
-- **Response**: `ReleaseDto` with `Id`, `Title`, `Artist`, `Genre`, `ReleaseDate`, `Medium`, `ImagePath`, and media-specific metadata satellites (`MixMetadata` for Cut/Mix, `SessionMetadata` for Session; others null).
+- **Route parameter `entryKey`** (string): the release's `EntryKey` (the public handle).
+- **Response**: `ReleaseDto` with `Id`, `EntryKey`, `Title`, `Artist`, `Genre`, `ReleaseDate`, `Medium`, `ImagePath`, and media-specific metadata satellites (`MixMetadata` for Cut/Mix, `SessionMetadata` for Session; others null).
 - Returns 200 on success. Returns 404 if not found. Returns 500 on query error.
 
-### GET api/release/{id:long}/mix/waveform (unauthenticated)
+### GET api/release/{entryKey}/mix/waveform (unauthenticated)
 
-Serves the high-res waveform datum for a Mix release as base64-encoded bytes. Mirrors `GET api/track/{id}/waveform` but reads from the `mix-waveforms` vault.
+Serves the high-res waveform datum for a Mix release as base64-encoded bytes. Mirrors `GET api/track/{id}/waveform` but reads from the `mix-waveforms` vault. Public read — addresses by the release `EntryKey` (§3e).
 
-- **Route parameter `id`** (long): the SQL release ID.
+- **Route parameter `entryKey`** (string): the release's `EntryKey`.
 - **Response**: `WaveformProfileDto` with `BucketCount` and `Data` (base64).
 - Returns 200 on success. Returns 404 if the release is not a Mix, carries no waveform key, or no datum is stored. Returns 500 on query/vault error.
 
diff --git a/DeepDrftAPI/Controllers/ReleaseController.cs b/DeepDrftAPI/Controllers/ReleaseController.cs
index d566c72..654213b 100644
--- a/DeepDrftAPI/Controllers/ReleaseController.cs
+++ b/DeepDrftAPI/Controllers/ReleaseController.cs
@@ -66,18 +66,20 @@ public class ReleaseController : ControllerBase
         return Ok(result.Value);
     }
 
-    // GET api/release/{id}/mix/waveform (unauthenticated)
+    // GET api/release/{entryKey}/mix/waveform (unauthenticated)
     // Serves the high-res waveform datum for a Mix release as base64. Mirrors GET api/track/{id}/waveform
     // but reads from the mix-waveforms vault. 404 when the release is not a Mix, carries no waveform key,
-    // or no datum is stored. Declared before the shorter "{id:long}" route for clarity.
-    [HttpGet("{id:long}/mix/waveform")]
-    public async Task<ActionResult> GetMixWaveform(long id, CancellationToken ct = default)
+    // or no datum is stored. Public read — addresses by the opaque EntryKey, not the int PK (§3e). The
+    // {entryKey} string segment cannot collide with the ApiKey-gated POST {id:long}/mix/waveform (different
+    // verb + constraint). Declared before the shorter "{entryKey}" route for clarity.
+    [HttpGet("{entryKey}/mix/waveform")]
+    public async Task<ActionResult> GetMixWaveform(string entryKey, CancellationToken ct = default)
     {
-        var lookup = await _releaseService.GetByIdAsync(id, ct);
+        var lookup = await _releaseService.GetByEntryKeyAsync(entryKey, ct);
         if (!lookup.Success)
         {
             var error = lookup.Messages.FirstOrDefault()?.Message ?? "Unknown error";
-            _logger.LogError("GetMixWaveform lookup failed for {ReleaseId}: {Error}", id, error);
+            _logger.LogError("GetMixWaveform lookup failed for {EntryKey}: {Error}", entryKey, error);
             return StatusCode(500, "Failed to load release");
         }
 
@@ -85,14 +87,14 @@ public class ReleaseController : ControllerBase
         var waveformEntryKey = release?.MixMetadata?.WaveformEntryKey;
         if (release is null || release.Medium != ReleaseMedium.Mix || string.IsNullOrEmpty(waveformEntryKey))
         {
-            _logger.LogInformation("No mix waveform datum for release: {ReleaseId}", id);
+            _logger.LogInformation("No mix waveform datum for release: {EntryKey}", entryKey);
             return NotFound();
         }
 
         var bytes = await _waveformProfileService.GetProfileAsync(waveformEntryKey, VaultConstants.MixWaveforms);
         if (bytes is null)
         {
-            _logger.LogInformation("Mix waveform key set but no datum stored for release: {ReleaseId}", id);
+            _logger.LogInformation("Mix waveform key set but no datum stored for release: {EntryKey}", entryKey);
             return NotFound();
         }
 
@@ -159,17 +161,18 @@ public class ReleaseController : ControllerBase
         return StatusCode(500, error);
     }
 
-    // GET api/release/{id} (unauthenticated)
-    // Single release with both metadata navs (nulls for non-matching media). Declared after the longer
-    // "{id:long}/mix/waveform" routes so the segmented routes resolve first.
-    [HttpGet("{id:long}")]
-    public async Task<ActionResult> GetReleaseById(long id, CancellationToken ct = default)
+    // GET api/release/{entryKey} (unauthenticated)
+    // Single release with both metadata navs (nulls for non-matching media). Public read — addresses by
+    // the opaque EntryKey, not the int PK (§3e). Declared after the longer "{entryKey}/mix/waveform"
+    // route so the segmented route resolves first.
+    [HttpGet("{entryKey}")]
+    public async Task<ActionResult> GetReleaseByEntryKey(string entryKey, CancellationToken ct = default)
     {
-        var result = await _releaseService.GetByIdAsync(id, ct);
+        var result = await _releaseService.GetByEntryKeyAsync(entryKey, ct);
         if (!result.Success)
         {
             var error = result.Messages.FirstOrDefault()?.Message ?? "Unknown error";
-            _logger.LogError("GetReleaseById failed for {ReleaseId}: {Error}", id, error);
+            _logger.LogError("GetReleaseByEntryKey failed for {EntryKey}: {Error}", entryKey, error);
             return StatusCode(500, "Failed to load release");
         }
 
diff --git a/DeepDrftData/Data/Configurations/ReleaseConfiguration.cs b/DeepDrftData/Data/Configurations/ReleaseConfiguration.cs
index 1e9ab4e..108f2af 100644
--- a/DeepDrftData/Data/Configurations/ReleaseConfiguration.cs
+++ b/DeepDrftData/Data/Configurations/ReleaseConfiguration.cs
@@ -21,6 +21,18 @@ public class ReleaseConfiguration : BaseEntityConfiguration<ReleaseEntity>
         builder.Property(e => e.UpdatedAt).HasColumnName("updated_at");
         builder.Property(e => e.IsDeleted).HasColumnName("is_deleted");
 
+        // App-minted GUID-string public handle, configured exactly like TrackConfiguration's
+        // entry_key: required, max 100, snake_case column. The unique index guarantees a release
+        // resolves to one row by its public key.
+        builder.Property(e => e.EntryKey)
+            .IsRequired()
+            .HasMaxLength(100)
+            .HasColumnName("entry_key");
+
+        builder.HasIndex(e => e.EntryKey)
+            .IsUnique()
+            .HasDatabaseName("IX_release_entry_key");
+
         builder.Property(e => e.Title)
             .IsRequired()
             .HasMaxLength(200)
diff --git a/DeepDrftData/IReleaseService.cs b/DeepDrftData/IReleaseService.cs
index dc567db..4782d8d 100644
--- a/DeepDrftData/IReleaseService.cs
+++ b/DeepDrftData/IReleaseService.cs
@@ -20,6 +20,9 @@ public interface IReleaseService
     /// <summary>Single release with both metadata navs included (nulls for non-matching media).</summary>
     Task<ResultContainer<ReleaseDto?>> GetByIdAsync(long id, CancellationToken cancellationToken = default);
 
+    /// <summary>The public addressing read: single release resolved by its opaque EntryKey (Phase 11 §3e). Both metadata navs included (nulls for non-matching media).</summary>
+    Task<ResultContainer<ReleaseDto?>> GetByEntryKeyAsync(string entryKey, CancellationToken cancellationToken = default);
+
     /// <summary>Track entry keys for a release. Single-entry for Session/Mix (enforced at upload); may be multiple for Cut.</summary>
     Task<ResultContainer<List<string>>> GetTrackEntryKeysAsync(long releaseId, CancellationToken cancellationToken = default);
 
diff --git a/DeepDrftData/Migrations/20260616210143_AddReleaseEntryKey.Designer.cs b/DeepDrftData/Migrations/20260616210143_AddReleaseEntryKey.Designer.cs
new file mode 100644
index 0000000..43974a9
--- /dev/null
+++ b/DeepDrftData/Migrations/20260616210143_AddReleaseEntryKey.Designer.cs
@@ -0,0 +1,318 @@
+// <auto-generated />
+using System;
+using DeepDrftData.Data;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace DeepDrftData.Migrations
+{
+    [DbContext(typeof(DeepDrftContext))]
+    [Migration("20260616210143_AddReleaseEntryKey")]
+    partial class AddReleaseEntryKey
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "10.0.7")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("DeepDrftModels.Entities.MixMetadata", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint")
+                        .HasColumnName("id");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created_at");
+
+                    b.Property<bool>("IsDeleted")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("boolean")
+                        .HasDefaultValue(false)
+                        .HasColumnName("is_deleted");
+
+                    b.Property<long>("ReleaseId")
+                        .HasColumnType("bigint")
+                        .HasColumnName("release_id");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("updated_at");
+
+                    b.Property<string>("WaveformEntryKey")
+                        .IsRequired()
+                        .HasMaxLength(500)
+                        .HasColumnType("character varying(500)")
+                        .HasColumnName("waveform_entry_key");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("IsDeleted")
+                        .HasDatabaseName("IX_mix_metadata_is_deleted");
+
+                    b.HasIndex("ReleaseId")
+                        .IsUnique()
+                        .HasDatabaseName("IX_mix_metadata_release_id");
+
+                    b.ToTable("mix_metadata", (string)null);
+                });
+
+            modelBuilder.Entity("DeepDrftModels.Entities.ReleaseEntity", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint")
+                        .HasColumnName("id");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<string>("Artist")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)")
+                        .HasColumnName("artist");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created_at");
+
+                    b.Property<long?>("CreatedByUserId")
+                        .HasColumnType("bigint")
+                        .HasColumnName("created_by_user_id");
+
+                    b.Property<string>("Description")
+                        .HasMaxLength(4000)
+                        .HasColumnType("character varying(4000)")
+                        .HasColumnName("description");
+
+                    b.Property<string>("EntryKey")
+                        .IsRequired()
+                        .HasMaxLength(100)
+                        .HasColumnType("character varying(100)")
+                        .HasColumnName("entry_key");
+
+                    b.Property<string>("Genre")
+                        .HasMaxLength(100)
+                        .HasColumnType("character varying(100)")
+                        .HasColumnName("genre");
+
+                    b.Property<string>("ImagePath")
+                        .HasMaxLength(500)
+                        .HasColumnType("character varying(500)")
+                        .HasColumnName("image_path");
+
+                    b.Property<bool>("IsDeleted")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("boolean")
+                        .HasDefaultValue(false)
+                        .HasColumnName("is_deleted");
+
+                    b.Property<string>("Medium")
+                        .IsRequired()
+                        .ValueGeneratedOnAdd()
+                        .HasMaxLength(20)
+                        .HasColumnType("character varying(20)")
+                        .HasDefaultValue("Cut")
+                        .HasColumnName("medium");
+
+                    b.Property<DateOnly?>("ReleaseDate")
+                        .HasColumnType("date")
+                        .HasColumnName("release_date");
+
+                    b.Property<string>("ReleaseType")
+                        .IsRequired()
+                        .ValueGeneratedOnAdd()
+                        .HasMaxLength(20)
+                        .HasColumnType("character varying(20)")
+                        .HasDefaultValue("Single")
+                        .HasColumnName("release_type");
+
+                    b.Property<string>("Title")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)")
+                        .HasColumnName("title");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("updated_at");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("EntryKey")
+                        .IsUnique()
+                        .HasDatabaseName("IX_release_entry_key");
+
+                    b.HasIndex("IsDeleted")
+                        .HasDatabaseName("IX_release_is_deleted");
+
+                    b.HasIndex("Title", "Artist")
+                        .IsUnique()
+                        .HasDatabaseName("IX_release_title_artist")
+                        .HasFilter("\"is_deleted\" = false");
+
+                    b.ToTable("release", (string)null);
+                });
+
+            modelBuilder.Entity("DeepDrftModels.Entities.SessionMetadata", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint")
+                        .HasColumnName("id");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created_at");
+
+                    b.Property<string>("HeroImageEntryKey")
+                        .IsRequired()
+                        .HasMaxLength(500)
+                        .HasColumnType("character varying(500)")
+                        .HasColumnName("hero_image_entry_key");
+
+                    b.Property<bool>("IsDeleted")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("boolean")
+                        .HasDefaultValue(false)
+                        .HasColumnName("is_deleted");
+
+                    b.Property<long>("ReleaseId")
+                        .HasColumnType("bigint")
+                        .HasColumnName("release_id");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("updated_at");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("IsDeleted")
+                        .HasDatabaseName("IX_session_metadata_is_deleted");
+
+                    b.HasIndex("ReleaseId")
+                        .IsUnique()
+                        .HasDatabaseName("IX_session_metadata_release_id");
+
+                    b.ToTable("session_metadata", (string)null);
+                });
+
+            modelBuilder.Entity("DeepDrftModels.Entities.TrackEntity", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint")
+                        .HasColumnName("id");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created_at");
+
+                    b.Property<string>("EntryKey")
+                        .IsRequired()
+                        .HasMaxLength(100)
+                        .HasColumnType("character varying(100)")
+                        .HasColumnName("entry_key");
+
+                    b.Property<bool>("IsDeleted")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("boolean")
+                        .HasDefaultValue(false)
+                        .HasColumnName("is_deleted");
+
+                    b.Property<string>("OriginalFileName")
+                        .HasMaxLength(500)
+                        .HasColumnType("character varying(500)")
+                        .HasColumnName("original_file_name");
+
+                    b.Property<long?>("ReleaseId")
+                        .HasColumnType("bigint")
+                        .HasColumnName("release_id");
+
+                    b.Property<string>("TrackName")
+                        .IsRequired()
+                        .HasMaxLength(200)
+                        .HasColumnType("character varying(200)")
+                        .HasColumnName("track_name");
+
+                    b.Property<int>("TrackNumber")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasDefaultValue(1)
+                        .HasColumnName("track_number");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("updated_at");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("IsDeleted")
+                        .HasDatabaseName("IX_track_is_deleted");
+
+                    b.HasIndex("ReleaseId");
+
+                    b.ToTable("track", (string)null);
+                });
+
+            modelBuilder.Entity("DeepDrftModels.Entities.MixMetadata", b =>
+                {
+                    b.HasOne("DeepDrftModels.Entities.ReleaseEntity", "Release")
+                        .WithOne("MixMetadata")
+                        .HasForeignKey("DeepDrftModels.Entities.MixMetadata", "ReleaseId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Release");
+                });
+
+            modelBuilder.Entity("DeepDrftModels.Entities.SessionMetadata", b =>
+                {
+                    b.HasOne("DeepDrftModels.Entities.ReleaseEntity", "Release")
+                        .WithOne("SessionMetadata")
+                        .HasForeignKey("DeepDrftModels.Entities.SessionMetadata", "ReleaseId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Release");
+                });
+
+            modelBuilder.Entity("DeepDrftModels.Entities.TrackEntity", b =>
+                {
+                    b.HasOne("DeepDrftModels.Entities.ReleaseEntity", "Release")
+                        .WithMany("Tracks")
+                        .HasForeignKey("ReleaseId")
+                        .OnDelete(DeleteBehavior.SetNull);
+
+                    b.Navigation("Release");
+                });
+
+            modelBuilder.Entity("DeepDrftModels.Entities.ReleaseEntity", b =>
+                {
+                    b.Navigation("MixMetadata");
+
+                    b.Navigation("SessionMetadata");
+
+                    b.Navigation("Tracks");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/DeepDrftData/Migrations/20260616210143_AddReleaseEntryKey.cs b/DeepDrftData/Migrations/20260616210143_AddReleaseEntryKey.cs
new file mode 100644
index 0000000..0caa8a0
--- /dev/null
+++ b/DeepDrftData/Migrations/20260616210143_AddReleaseEntryKey.cs
@@ -0,0 +1,65 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace DeepDrftData.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddReleaseEntryKey : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            // 11.H — front the int PK with an app-minted GUID-string EntryKey (Phase 11 §3e). The
+            // scaffolded single non-null-with-"" add is hand-edited into the three-step backfill the
+            // spec requires (§3e.5(2)): existing rows must each get a UNIQUE, non-null key, so a shared
+            // "" default would collide on the unique index. Add nullable → backfill a GUID per row →
+            // mark non-null. No DB default is set on the final column: new rows are app-populated by
+            // FindOrCreateRelease (Guid.NewGuid().ToString()), exactly as tracks mint their EntryKey.
+
+            // 1) Add the column nullable so the backfill can run before the NOT NULL constraint.
+            migrationBuilder.AddColumn<string>(
+                name: "entry_key",
+                table: "release",
+                type: "character varying(100)",
+                maxLength: 100,
+                nullable: true);
+
+            // 2) Backfill a unique GUID string per existing row. gen_random_uuid()::text yields the
+            //    lowercase 36-char hyphenated shape Guid.NewGuid().ToString() produces, so migrated and
+            //    app-minted keys are indistinguishable. Per-row evaluation → each row gets a distinct key.
+            migrationBuilder.Sql(
+                "UPDATE \"release\" SET \"entry_key\" = gen_random_uuid()::text WHERE \"entry_key\" IS NULL;");
+
+            // 3) Now every row is populated and unique — enforce NOT NULL.
+            migrationBuilder.AlterColumn<string>(
+                name: "entry_key",
+                table: "release",
+                type: "character varying(100)",
+                maxLength: 100,
+                nullable: false,
+                oldClrType: typeof(string),
+                oldType: "character varying(100)",
+                oldMaxLength: 100,
+                oldNullable: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_release_entry_key",
+                table: "release",
+                column: "entry_key",
+                unique: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropIndex(
+                name: "IX_release_entry_key",
+                table: "release");
+
+            migrationBuilder.DropColumn(
+                name: "entry_key",
+                table: "release");
+        }
+    }
+}
diff --git a/DeepDrftData/Migrations/DeepDrftContextModelSnapshot.cs b/DeepDrftData/Migrations/DeepDrftContextModelSnapshot.cs
index dbfb337..33b6111 100644
--- a/DeepDrftData/Migrations/DeepDrftContextModelSnapshot.cs
+++ b/DeepDrftData/Migrations/DeepDrftContextModelSnapshot.cs
@@ -95,6 +95,12 @@ namespace DeepDrftData.Migrations
                         .HasColumnType("character varying(4000)")
                         .HasColumnName("description");
 
+                    b.Property<string>("EntryKey")
+                        .IsRequired()
+                        .HasMaxLength(100)
+                        .HasColumnType("character varying(100)")
+                        .HasColumnName("entry_key");
+
                     b.Property<string>("Genre")
                         .HasMaxLength(100)
                         .HasColumnType("character varying(100)")
@@ -143,6 +149,10 @@ namespace DeepDrftData.Migrations
 
                     b.HasKey("Id");
 
+                    b.HasIndex("EntryKey")
+                        .IsUnique()
+                        .HasDatabaseName("IX_release_entry_key");
+
                     b.HasIndex("IsDeleted")
                         .HasDatabaseName("IX_release_is_deleted");
 
diff --git a/DeepDrftData/ReleaseManager.cs b/DeepDrftData/ReleaseManager.cs
index 0763b51..d64c149 100644
--- a/DeepDrftData/ReleaseManager.cs
+++ b/DeepDrftData/ReleaseManager.cs
@@ -94,6 +94,20 @@ public class ReleaseManager : IReleaseService
         }
     }
 
+    public async Task<ResultContainer<ReleaseDto?>> GetByEntryKeyAsync(string entryKey, CancellationToken cancellationToken = default)
+    {
+        try
+        {
+            var entity = await _repository.GetByEntryKeyWithMetadataAsync(entryKey, cancellationToken);
+            return ResultContainer<ReleaseDto?>.CreatePassResult(
+                entity is null ? null : TrackConverter.Convert(entity));
+        }
+        catch (Exception e)
+        {
+            return ResultContainer<ReleaseDto?>.CreateFailResult(e.Message);
+        }
+    }
+
     public async Task<ResultContainer<List<string>>> GetTrackEntryKeysAsync(long releaseId, CancellationToken cancellationToken = default)
     {
         try
diff --git a/DeepDrftData/Repositories/ReleaseRepository.cs b/DeepDrftData/Repositories/ReleaseRepository.cs
index 0bc1158..9509e8d 100644
--- a/DeepDrftData/Repositories/ReleaseRepository.cs
+++ b/DeepDrftData/Repositories/ReleaseRepository.cs
@@ -95,6 +95,16 @@ public class ReleaseRepository
             .Include(r => r.MixMetadata)
             .FirstOrDefaultAsync(ct);
 
+    // The public addressing read: resolve a release by its opaque EntryKey (Phase 11 §3e). Mirrors
+    // GetByIdWithMetadataAsync but keys on the unique entry_key column — the int PK never reaches the
+    // public surface. The resolved entity still carries its int Id for internal joins (track page).
+    public async Task<ReleaseEntity?> GetByEntryKeyWithMetadataAsync(string entryKey, CancellationToken ct)
+        => await _context.Releases
+            .Where(r => r.EntryKey == entryKey && !r.IsDeleted)
+            .Include(r => r.SessionMetadata)
+            .Include(r => r.MixMetadata)
+            .FirstOrDefaultAsync(ct);
+
     // Non-deleted track counts for a specific set of releases, for populating ReleaseDto.TrackCount on
     // list reads without an N+1 fan-out. Releases with zero live tracks are absent from the dictionary.
     public async Task<Dictionary<long, int>> GetTrackCountsByReleaseIdsAsync(
diff --git a/DeepDrftData/TrackConverter.cs b/DeepDrftData/TrackConverter.cs
index 9de23ac..7827d9b 100644
--- a/DeepDrftData/TrackConverter.cs
+++ b/DeepDrftData/TrackConverter.cs
@@ -19,6 +19,7 @@ public class TrackConverter : IEntityToModelConverter<TrackEntity, TrackDto>
     public static ReleaseDto Convert(ReleaseEntity entity) => new()
     {
         Id = entity.Id,
+        EntryKey = entity.EntryKey,
         CreatedAt = entity.CreatedAt,
         UpdatedAt = entity.UpdatedAt,
         Title = entity.Title,
@@ -51,6 +52,10 @@ public class TrackConverter : IEntityToModelConverter<TrackEntity, TrackDto>
     public static ReleaseEntity Convert(ReleaseDto dto) => new()
     {
         Id = dto.Id,
+        // Round-trips the public handle. On the create path (FindOrCreateRelease) the DTO carries no
+        // EntryKey yet, so that path overrides this with a freshly minted GUID — the same shape as the
+        // natural-key (Title/Artist) override there.
+        EntryKey = dto.EntryKey,
         CreatedAt = dto.CreatedAt,
         UpdatedAt = dto.UpdatedAt,
         Title = dto.Title,
diff --git a/DeepDrftData/TrackManager.cs b/DeepDrftData/TrackManager.cs
index 643aa64..73c466a 100644
--- a/DeepDrftData/TrackManager.cs
+++ b/DeepDrftData/TrackManager.cs
@@ -177,6 +177,9 @@ public class TrackManager
             // in releaseData so a typo upstream cannot create a release that won't be found again.
             var entity = TrackConverter.Convert(releaseData);
             entity.Id = 0;
+            // Mint the public EntryKey app-side at creation — the identical call tracks make in
+            // TrackContentService (Phase 11 §3e.4). The incoming DTO carries no key on the create path.
+            entity.EntryKey = Guid.NewGuid().ToString();
             entity.Title = title;
             entity.Artist = artist;
 
diff --git a/DeepDrftModels/DTOs/ReleaseDto.cs b/DeepDrftModels/DTOs/ReleaseDto.cs
index 5df19f6..5fb09bd 100644
--- a/DeepDrftModels/DTOs/ReleaseDto.cs
+++ b/DeepDrftModels/DTOs/ReleaseDto.cs
@@ -9,6 +9,10 @@ namespace DeepDrftModels.DTOs;
 // TrackConverter assigns every field on the round-trip, so an empty default is never observable.
 public class ReleaseDto : BaseModel
 {
+    // The release's public handle — the GUID string the public site/API address it by (Phase 11 §3e).
+    // Mirrors TrackDto's EntryKey. No `required` (BaseModel/Manager<> need new()); TrackConverter
+    // assigns it on every round-trip, so an empty default is never observable.
+    public string EntryKey { get; set; } = string.Empty;
     public string Title { get; set; } = string.Empty;
     public string Artist { get; set; } = string.Empty;
     public string? Genre { get; set; }
diff --git a/DeepDrftModels/Entities/ReleaseEntity.cs b/DeepDrftModels/Entities/ReleaseEntity.cs
index 6cf3533..1009f77 100644
--- a/DeepDrftModels/Entities/ReleaseEntity.cs
+++ b/DeepDrftModels/Entities/ReleaseEntity.cs
@@ -12,6 +12,12 @@ namespace DeepDrftModels.Entities;
 // explicitly to satisfy the generic constraints on Repository<>/Manager<>/etc.
 public class ReleaseEntity : BaseEntity, IEntity
 {
+    // App-minted GUID-string public handle, mirroring TrackEntity.EntryKey exactly: required string,
+    // entry_key column, unique index, born app-side as Guid.NewGuid().ToString() at release creation
+    // (the FindOrCreateRelease path). Fronts the int Id (the DB-only PK, unused by the app) so the
+    // public site/API address releases by an opaque key, never the transparent sequential id
+    // (Phase 11 §3e). Unlike a track's EntryKey it has no vault job — it is purely an identifier.
+    public required string EntryKey { get; set; }
     public required string Title { get; set; }
     public required string Artist { get; set; }
     public string? Genre { get; set; }
diff --git a/DeepDrftPublic.Client/Clients/ReleaseClient.cs b/DeepDrftPublic.Client/Clients/ReleaseClient.cs
index 3e89769..515f1c1 100644
--- a/DeepDrftPublic.Client/Clients/ReleaseClient.cs
+++ b/DeepDrftPublic.Client/Clients/ReleaseClient.cs
@@ -69,9 +69,9 @@ public class ReleaseClient
             : ApiResult<PagedResult<ReleaseDto>>.CreateFailResult("Failed to deserialize response");
     }
 
-    public async Task<ApiResult<ReleaseDto>> GetById(long id)
+    public async Task<ApiResult<ReleaseDto>> GetByEntryKey(string entryKey)
     {
-        var response = await _http.GetAsync($"api/release/{id}");
+        var response = await _http.GetAsync($"api/release/{Uri.EscapeDataString(entryKey)}");
 
         if (!response.IsSuccessStatusCode)
             return ApiResult<ReleaseDto>.CreateFailResult($"HTTP {(int)response.StatusCode}");
@@ -85,13 +85,13 @@ public class ReleaseClient
     }
 
     /// <summary>
-    /// Fetches the high-res waveform datum for a Mix release. A 404 means no datum is stored
-    /// (not yet generated, or not a Mix) — a valid state, so it returns a pass result with a
-    /// null value. Any other non-success status is a genuine failure.
+    /// Fetches the high-res waveform datum for a Mix release, addressed by its public EntryKey. A 404
+    /// means no datum is stored (not yet generated, or not a Mix) — a valid state, so it returns a pass
+    /// result with a null value. Any other non-success status is a genuine failure.
     /// </summary>
-    public async Task<ApiResult<WaveformProfileDto?>> GetMixWaveform(long id)
+    public async Task<ApiResult<WaveformProfileDto?>> GetMixWaveform(string entryKey)
     {
-        var response = await _http.GetAsync($"api/release/{id}/mix/waveform");
+        var response = await _http.GetAsync($"api/release/{Uri.EscapeDataString(entryKey)}/mix/waveform");
 
         if (response.StatusCode == System.Net.HttpStatusCode.NotFound)
             return ApiResult<WaveformProfileDto?>.CreatePassResult(null);
diff --git a/DeepDrftPublic.Client/Common/ReleaseRoutes.cs b/DeepDrftPublic.Client/Common/ReleaseRoutes.cs
index e857627..7ed08b0 100644
--- a/DeepDrftPublic.Client/Common/ReleaseRoutes.cs
+++ b/DeepDrftPublic.Client/Common/ReleaseRoutes.cs
@@ -14,17 +14,19 @@ namespace DeepDrftPublic.Client.Common;
 public static class ReleaseRoutes
 {
     /// <summary>
-    /// The dedicated detail route for a release: <c>/cuts/{id}</c>, <c>/sessions/{id}</c>, or
-    /// <c>/mixes/{id}</c>. Cut is the default arm so a new medium without an entry here surfaces a
-    /// build-visible gap rather than a silent fallthrough — extend the switch when a fourth medium lands.
+    /// The dedicated detail route for a release: <c>/cuts/{entryKey}</c>, <c>/sessions/{entryKey}</c>,
+    /// or <c>/mixes/{entryKey}</c>. The route carries the release's opaque public EntryKey (Phase 11
+    /// §3e) — never the transparent int PK. Cut is the default arm so a new medium without an entry
+    /// here surfaces a build-visible gap rather than a silent fallthrough — extend the switch when a
+    /// fourth medium lands.
     /// </summary>
-    public static string DetailHref(long id, ReleaseMedium medium) => medium switch
+    public static string DetailHref(string entryKey, ReleaseMedium medium) => medium switch
     {
-        ReleaseMedium.Session => $"/sessions/{id}",
-        ReleaseMedium.Mix => $"/mixes/{id}",
-        _ => $"/cuts/{id}",
+        ReleaseMedium.Session => $"/sessions/{entryKey}",
+        ReleaseMedium.Mix => $"/mixes/{entryKey}",
+        _ => $"/cuts/{entryKey}",
     };
 
     /// <summary>Convenience overload for call sites holding a <see cref="ReleaseDto"/>.</summary>
-    public static string DetailHref(ReleaseDto release) => DetailHref(release.Id, release.Medium);
+    public static string DetailHref(ReleaseDto release) => DetailHref(release.EntryKey, release.Medium);
 }
diff --git a/DeepDrftPublic.Client/Controls/MixWaveformVisualizer.razor b/DeepDrftPublic.Client/Controls/MixWaveformVisualizer.razor
index ea9c23c..a911279 100644
--- a/DeepDrftPublic.Client/Controls/MixWaveformVisualizer.razor
+++ b/DeepDrftPublic.Client/Controls/MixWaveformVisualizer.razor
@@ -3,7 +3,7 @@
 @* Full-page scrolling Mix waveform background (Phase 9, 8.K). A windowed slice of the mix's loudness
    datum scrolls bottom-to-top, coupled to playback; a zoom slider controls the visible time-span (and
    so the apparent scroll speed, Guitar-Hero style). Strictly read-only: it self-fetches its datum from
-   ReleaseId, takes playback as one-way input only, and never seeks or writes back. The rAF loop and all
+   ReleaseEntryKey, takes playback as one-way input only, and never seeks or writes back. The rAF loop and all
    scroll/zoom/compositing math live in the MixVisualizer.ts interop module; this component is a thin
    bridge that feeds it datum + playback + zoom + theme. Deliberately NOT the player-bar peak-bar idiom. *@
 
diff --git a/DeepDrftPublic.Client/Controls/MixWaveformVisualizer.razor.cs b/DeepDrftPublic.Client/Controls/MixWaveformVisualizer.razor.cs
index 55085b4..ee0ca29 100644
--- a/DeepDrftPublic.Client/Controls/MixWaveformVisualizer.razor.cs
+++ b/DeepDrftPublic.Client/Controls/MixWaveformVisualizer.razor.cs
@@ -9,7 +9,7 @@ namespace DeepDrftPublic.Client.Controls;
 
 /// <summary>
 /// Full-page scrolling Mix waveform background. Standalone and reusable: give it a
-/// <see cref="ReleaseId"/> and it fetches its own loudness datum. The rendering itself — a windowed,
+/// <see cref="ReleaseEntryKey"/> and it fetches its own loudness datum. The rendering itself — a windowed,
 /// bottom-to-top, playback-coupled scroll with a glassy theme-aware gradient — lives in the
 /// MixVisualizer.ts interop module; this component is the bridge that feeds it datum, playback
 /// position, zoom, and theme, and owns the module lifecycle.
@@ -36,8 +36,8 @@ public partial class MixWaveformVisualizer : ComponentBase, IAsyncDisposable
     // us, and OnAfterRender pushes fresh palette colours into the module.
     [CascadingParameter] public DarkModeSettings? DarkMode { get; set; }
 
-    /// <summary>The Mix release whose waveform datum to fetch and render.</summary>
-    [Parameter] public required long ReleaseId { get; set; }
+    /// <summary>The opaque public EntryKey of the Mix release whose waveform datum to fetch and render.</summary>
+    [Parameter] public required string ReleaseEntryKey { get; set; }
 
     /// <summary>
     /// The id of this mix's playable track. Used to gate the cascaded player as the live source: we
@@ -75,7 +75,7 @@ public partial class MixWaveformVisualizer : ComponentBase, IAsyncDisposable
 
     private IStreamingPlayerService? _subscribedService;
     private WaveformProfileDto? _profile;
-    private long? _loadedReleaseId;
+    private string? _loadedReleaseKey;
 
     // Whether we are subscribed to the shared control state's Changed event. The controls row (a
     // sibling component) mutates ControlState and raises Changed; we push the affected uniforms.
@@ -114,21 +114,21 @@ public partial class MixWaveformVisualizer : ComponentBase, IAsyncDisposable
                 _subscribedService.StateChanged -= OnPlayerStateChanged;
             PlayerService.StateChanged += OnPlayerStateChanged;
             _subscribedService = PlayerService;
-            DebugLog($"subscribed to player StateChanged. ReleaseId={ReleaseId}, TrackId={TrackId?.ToString() ?? "null"}.");
+            DebugLog($"subscribed to player StateChanged. ReleaseEntryKey={ReleaseEntryKey}, TrackId={TrackId?.ToString() ?? "null"}.");
         }
         else if (PlayerService is null)
         {
-            DebugLog($"NO player cascade — playback will never couple. ReleaseId={ReleaseId}, TrackId={TrackId?.ToString() ?? "null"}.");
+            DebugLog($"NO player cascade — playback will never couple. ReleaseEntryKey={ReleaseEntryKey}, TrackId={TrackId?.ToString() ?? "null"}.");
         }
 
-        // ReleaseId is the only fetch input; fetch once per id. Position/zoom/theme changes re-render
-        // but must not refetch, and a release with no datum must not refetch either — so the guard
-        // keys on the fetched id, not on whether a profile came back.
-        if (_loadedReleaseId == ReleaseId) return;
-        _loadedReleaseId = ReleaseId;
+        // ReleaseEntryKey is the only fetch input; fetch once per key. Position/zoom/theme changes
+        // re-render but must not refetch, and a release with no datum must not refetch either — so the
+        // guard keys on the fetched key, not on whether a profile came back.
+        if (_loadedReleaseKey == ReleaseEntryKey) return;
+        _loadedReleaseKey = ReleaseEntryKey;
 
-        DebugLog($"fetching mix waveform datum for ReleaseId={ReleaseId}…");
-        var result = await ReleaseData.GetMixWaveform(ReleaseId);
+        DebugLog($"fetching mix waveform datum for ReleaseEntryKey={ReleaseEntryKey}…");
+        var result = await ReleaseData.GetMixWaveform(ReleaseEntryKey);
         if (result is { Success: true, Value: { } profile } && profile.BucketCount > 0 && profile.Data.Length > 0)
         {
             _profile = profile;
@@ -140,7 +140,7 @@ public partial class MixWaveformVisualizer : ComponentBase, IAsyncDisposable
             // renders its content over a plain background.
             _profile = null;
             DebugLog(result.Success
-                ? $"datum fetch returned EMPTY/absent (no stored datum for ReleaseId={ReleaseId}) — backdrop stays blank."
+                ? $"datum fetch returned EMPTY/absent (no stored datum for ReleaseEntryKey={ReleaseEntryKey}) — backdrop stays blank."
                 : $"datum fetch FAILED ({result.GetMessage() ?? "unknown error"}) — backdrop stays blank.");
         }
 
diff --git a/DeepDrftPublic.Client/Controls/ReleaseGallery.razor b/DeepDrftPublic.Client/Controls/ReleaseGallery.razor
index 7d20bad..47ec7d9 100644
--- a/DeepDrftPublic.Client/Controls/ReleaseGallery.razor
+++ b/DeepDrftPublic.Client/Controls/ReleaseGallery.razor
@@ -5,7 +5,7 @@
    the parent supplies it one of two ways:
      - DetailRoute (the simple default): every card links /{DetailRoute}/{id} (Sessions, Mixes).
      - HrefResolver (per-card): each card links HrefResolver(release), so Archive routes each card by
-       its own medium through the one ReleaseRoutes table, and Cuts routes to /cuts/{id}.
+       its own medium through the one ReleaseRoutes table, and Cuts routes to /cuts/{entryKey}.
    HrefResolver wins when both are supplied. The card subtitle defaults to the artist; SubtitleResolver
    overrides it (Cuts shows a track count instead). Fully controlled by the parent: loading and item
    state are passed in. *@
@@ -82,7 +82,7 @@
     /// <summary>
     /// Per-card href resolver. When supplied, a card links to its result instead of the
     /// <see cref="DetailRoute"/>-based href, letting Archive route each card by its own medium and
-    /// Cuts route to /cuts/{id} (both via <c>ReleaseRoutes.DetailHref</c>).
+    /// Cuts route to /cuts/{entryKey} (both via <c>ReleaseRoutes.DetailHref</c>).
     /// </summary>
     [Parameter] public Func<DeepDrftModels.DTOs.ReleaseDto, string>? HrefResolver { get; set; }
 
@@ -95,5 +95,5 @@
     [Parameter] public string EmptyMessage { get; set; } = "Nothing here yet";
 
     private string CardHref(DeepDrftModels.DTOs.ReleaseDto release)
-        => HrefResolver?.Invoke(release) ?? $"/{DetailRoute}/{release.Id}";
+        => HrefResolver?.Invoke(release) ?? $"/{DetailRoute}/{release.EntryKey}";
 }
diff --git a/DeepDrftPublic.Client/Controls/SharePopover.razor.cs b/DeepDrftPublic.Client/Controls/SharePopover.razor.cs
index a6217c3..268300d 100644
--- a/DeepDrftPublic.Client/Controls/SharePopover.razor.cs
+++ b/DeepDrftPublic.Client/Controls/SharePopover.razor.cs
@@ -8,7 +8,7 @@ namespace DeepDrftPublic.Client.Controls;
 /// <summary>
 /// Share affordance with two modes from one source of clipboard/popover-chrome logic
 /// (Phase 11 §3b). Track mode (<see cref="EntryKey"/> set) offers a canonical-link copy plus an
-/// optional iframe embed snippet. Release mode (<see cref="ReleaseId"/> set) is copy-link-only —
+/// optional iframe embed snippet. Release mode (<see cref="ReleaseEntryKey"/> set) is copy-link-only —
 /// it copies the absolute form of the release's canonical detail URL and hides the embed
 /// affordance, since a release page is not a single-track embed. Clipboard writes go through
 /// navigator.clipboard; each copy shows a transient "Copied!" confirmation that resets after a
@@ -19,8 +19,8 @@ public partial class SharePopover : ComponentBase, IDisposable
     /// <summary>Track mode: the vault entry key of the track to share. Mutually exclusive with the release target.</summary>
     [Parameter] public string? EntryKey { get; set; }
 
-    /// <summary>Release mode: the release id to share. When set (with <see cref="ReleaseMedium"/>), the popover shares the release detail URL and omits the embed option.</summary>
-    [Parameter] public long? ReleaseId { get; set; }
+    /// <summary>Release mode: the release's opaque public EntryKey to share. When set (with <see cref="ReleaseMedium"/>), the popover shares the release detail URL and omits the embed option.</summary>
+    [Parameter] public string? ReleaseEntryKey { get; set; }
 
     /// <summary>Release mode: the medium of the release, used to resolve its canonical detail route.</summary>
     [Parameter] public ReleaseMedium ReleaseMedium { get; set; }
@@ -28,7 +28,7 @@ public partial class SharePopover : ComponentBase, IDisposable
     [Inject] public required NavigationManager Navigation { get; set; }
     [Inject] public required IJSRuntime JS { get; set; }
 
-    private bool IsReleaseMode => ReleaseId is not null;
+    private bool IsReleaseMode => ReleaseEntryKey is not null;
 
     private bool _open;
     private bool _embed;
@@ -51,7 +51,7 @@ public partial class SharePopover : ComponentBase, IDisposable
     // route (which carries a leading slash) and composes it against BaseUri (which carries a
     // trailing slash) — trim one to avoid a doubled separator.
     private string LinkUrl => IsReleaseMode
-        ? $"{Navigation.BaseUri.TrimEnd('/')}{ReleaseRoutes.DetailHref(ReleaseId!.Value, ReleaseMedium)}"
+        ? $"{Navigation.BaseUri.TrimEnd('/')}{ReleaseRoutes.DetailHref(ReleaseEntryKey!, ReleaseMedium)}"
         : TrackUrl;
 
     private string TrackUrl => $"{Navigation.BaseUri}track/{EntryKey}";
diff --git a/DeepDrftPublic.Client/Pages/AlbumsView.razor b/DeepDrftPublic.Client/Pages/AlbumsView.razor
index 536d130..071ee68 100644
--- a/DeepDrftPublic.Client/Pages/AlbumsView.razor
+++ b/DeepDrftPublic.Client/Pages/AlbumsView.razor
@@ -3,7 +3,7 @@
 
 <PageTitle>DeepDrft Cuts</PageTitle>
 
-@* The shared release-card grid; each card routes to /cuts/{id} via the one ReleaseRoutes table.
+@* The shared release-card grid; each card routes to /cuts/{entryKey} via the one ReleaseRoutes table.
    Cuts show a track count where other media show the artist, supplied via SubtitleResolver. *@
 <ReleaseGallery Releases="@_albums"
                 Loading="@_loading"
diff --git a/DeepDrftPublic.Client/Pages/AlbumsView.razor.cs b/DeepDrftPublic.Client/Pages/AlbumsView.razor.cs
index 2210cd5..f7acbe3 100644
--- a/DeepDrftPublic.Client/Pages/AlbumsView.razor.cs
+++ b/DeepDrftPublic.Client/Pages/AlbumsView.razor.cs
@@ -11,7 +11,7 @@ namespace DeepDrftPublic.Client.Pages;
 /// Medium-filtered release gallery. Routed at <c>/cuts</c> (Cut releases) and parameterized by
 /// <see cref="Medium"/> so the same component can back any medium's card grid without a fork.
 /// Cards open the release's dedicated detail page via <see cref="ReleaseRoutes.DetailHref(ReleaseDto)"/>
-/// (a Cut routes to <c>/cuts/{id}</c>), the single source for medium→route resolution (Phase 11 §2).
+/// (a Cut routes to <c>/cuts/{entryKey}</c>), the single source for medium→route resolution (Phase 11 §2).
 /// </summary>
 public partial class AlbumsView : ComponentBase, IDisposable
 {
diff --git a/DeepDrftPublic.Client/Pages/CutDetail.razor b/DeepDrftPublic.Client/Pages/CutDetail.razor
index 2500049..0a6fff9 100644
--- a/DeepDrftPublic.Client/Pages/CutDetail.razor
+++ b/DeepDrftPublic.Client/Pages/CutDetail.razor
@@ -1,4 +1,4 @@
-@page "/cuts/{Id:long}"
+@page "/cuts/{EntryKey}"
 @using DeepDrftModels.DTOs
 @using DeepDrftPublic.Client.Controls
 @using DeepDrftPublic.Client.Services
@@ -79,8 +79,8 @@ else
                             Play
                         </MudButton>
 
-                        @* Release-mode share: copies the canonical /cuts/{id} URL, not a single track (§3b). *@
-                        <SharePopover ReleaseId="@release.Id" ReleaseMedium="@release.Medium" />
+                        @* Release-mode share: copies the canonical /cuts/{entryKey} URL, not a single track (§3b). *@
+                        <SharePopover ReleaseEntryKey="@release.EntryKey" ReleaseMedium="@release.Medium" />
                     </div>
                 </div>
 
diff --git a/DeepDrftPublic.Client/Pages/CutDetailBase.cs b/DeepDrftPublic.Client/Pages/CutDetailBase.cs
index 9979557..13020fb 100644
--- a/DeepDrftPublic.Client/Pages/CutDetailBase.cs
+++ b/DeepDrftPublic.Client/Pages/CutDetailBase.cs
@@ -5,7 +5,7 @@ using Microsoft.AspNetCore.Components;
 namespace DeepDrftPublic.Client.Pages;
 
 /// <summary>
-/// Load + prerender-bridge logic for the Cut album-detail page (/cuts/{id}). Mirrors
+/// Load + prerender-bridge logic for the Cut album-detail page (/cuts/{entryKey}). Mirrors
 /// <see cref="ReleaseDetailBase"/>'s discipline (id-addressed load in OnParametersSetAsync,
 /// PersistentComponentState bridge guarded on id) but carries the multi-track payload (release +
 /// ordered track list) the Cut page needs. Kept separate from the single-track base so neither
@@ -15,16 +15,16 @@ public abstract class CutDetailBase : ComponentBase, IDisposable
 {
     private const string PersistKey = "cut-detail";
 
-    [Parameter] public long Id { get; set; }
+    [Parameter] public string EntryKey { get; set; } = string.Empty;
     [Inject] public required CutDetailViewModel ViewModel { get; set; }
     [Inject] public required PersistentComponentState PersistentState { get; set; }
 
     private PersistingComponentStateSubscription _persistingSubscription;
 
-    // The release id the ViewModel currently holds — tracks param-only navigations (e.g.
-    // /cuts/5 -> /cuts/8) which reuse this component instance and fire OnParametersSet without
+    // The release EntryKey the ViewModel currently holds — tracks param-only navigations (e.g.
+    // /cuts/{a} -> /cuts/{b}) which reuse this component instance and fire OnParametersSet without
     // re-running OnInitialized. Without it the page would keep the prior album's tracks.
-    private long _loadedId;
+    private string? _loadedKey;
     private bool _loaded;
 
     protected override void OnInitialized()
@@ -32,25 +32,25 @@ public abstract class CutDetailBase : ComponentBase, IDisposable
 
     protected override async Task OnParametersSetAsync()
     {
-        if (_loaded && _loadedId == Id) return;
+        if (_loaded && _loadedKey == EntryKey) return;
 
-        // Capture the id synchronously before any await so a re-entrant call (rapid navigation or a
-        // re-render that changes Id while Load is in flight) sees the correct guard state.
-        _loadedId = Id;
+        // Capture the key synchronously before any await so a re-entrant call (rapid navigation or a
+        // re-render that changes EntryKey while Load is in flight) sees the correct guard state.
+        _loadedKey = EntryKey;
         _loaded = true;
 
         // The bridged payload carries the release and its ordered tracks so the interactive pass
-        // renders identically without a second round-trip. Guard on the id: a payload for a different
+        // renders identically without a second round-trip. Guard on the key: a payload for a different
         // release must not seed this page (stale-bridge bleed across navigation).
         if (PersistentState.TryTakeFromJson<BridgedCut>(PersistKey, out var restored)
             && restored?.Release is not null
-            && restored.Release.Id == Id)
+            && restored.Release.EntryKey == EntryKey)
         {
             ViewModel.Restore(restored.Release, restored.Tracks);
         }
         else
         {
-            await ViewModel.Load(Id);
+            await ViewModel.Load(EntryKey);
         }
     }
 
diff --git a/DeepDrftPublic.Client/Pages/MixDetail.razor b/DeepDrftPublic.Client/Pages/MixDetail.razor
index 6b6f560..79a4178 100644
--- a/DeepDrftPublic.Client/Pages/MixDetail.razor
+++ b/DeepDrftPublic.Client/Pages/MixDetail.razor
@@ -1,4 +1,4 @@
-@page "/mixes/{Id:long}"
+@page "/mixes/{EntryKey}"
 @using DeepDrftPublic.Client.Controls
 @inherits ReleaseDetailBase
 
@@ -37,7 +37,7 @@ else
     @* Full-page waveform sits behind the scaffold content. The scaffold's container is positioned
        above it via the mix-detail-foreground stacking context. TrackId lets the visualizer couple to
        playback only when the player is on this mix's track. *@
-    <MixWaveformVisualizer ReleaseId="@release.Id" TrackId="@ViewModel.Track?.Id" />
+    <MixWaveformVisualizer ReleaseEntryKey="@release.EntryKey" TrackId="@ViewModel.Track?.Id" />
 
     <div class="mix-detail-foreground">
       <MudContainer MaxWidth="MaxWidth.Large" Class="mix-detail-container">
diff --git a/DeepDrftPublic.Client/Pages/ReleaseDetailBase.cs b/DeepDrftPublic.Client/Pages/ReleaseDetailBase.cs
index 4e5d313..2dd9077 100644
--- a/DeepDrftPublic.Client/Pages/ReleaseDetailBase.cs
+++ b/DeepDrftPublic.Client/Pages/ReleaseDetailBase.cs
@@ -13,17 +13,17 @@ namespace DeepDrftPublic.Client.Pages;
 /// </summary>
 public abstract class ReleaseDetailBase : ComponentBase, IDisposable
 {
-    [Parameter] public long Id { get; set; }
+    [Parameter] public string EntryKey { get; set; } = string.Empty;
     [Inject] public required ReleaseDetailViewModel ViewModel { get; set; }
     [Inject] public required PersistentComponentState PersistentState { get; set; }
 
     private PersistingComponentStateSubscription _persistingSubscription;
 
-    // The release id the ViewModel currently holds. Tracks param-only navigations (e.g.
-    // /mixes/5 -> /mixes/8) which reuse this component instance and fire OnParametersSet
+    // The release EntryKey the ViewModel currently holds. Tracks param-only navigations (e.g.
+    // /mixes/{a} -> /mixes/{b}) which reuse this component instance and fire OnParametersSet
     // without re-running OnInitialized — without this, the page would keep the prior
     // release's track and Play would stream the wrong audio.
-    private long _loadedId;
+    private string? _loadedKey;
     private bool _loaded;
 
     // Distinct keys per medium so a Session restore never lands on a Mix page.
@@ -34,31 +34,31 @@ public abstract class ReleaseDetailBase : ComponentBase, IDisposable
 
     protected override async Task OnParametersSetAsync()
     {
-        // Re-run whenever the route id changes. Component instances are reused across
+        // Re-run whenever the route key changes. Component instances are reused across
         // same-template navigations, so the load decision must live here, not in
         // OnInitialized (which fires once per instance).
-        if (_loaded && _loadedId == Id) return;
+        if (_loaded && _loadedKey == EntryKey) return;
 
-        // Capture the id synchronously before any await so that a re-entrant call
-        // (rapid navigation or a re-render that changes Id while Load is in flight)
+        // Capture the key synchronously before any await so that a re-entrant call
+        // (rapid navigation or a re-render that changes EntryKey while Load is in flight)
         // sees the correct guard state. Without this, a second OnParametersSetAsync
-        // for the same Id would bypass the guard above and start a second Load,
+        // for the same key would bypass the guard above and start a second Load,
         // causing two ViewModel.Load calls to race on the single scoped instance.
-        _loadedId = Id;
+        _loadedKey = EntryKey;
         _loaded = true;
 
         // The bridged payload carries both the release and its resolved track so the interactive
-        // pass renders identically without a second round-trip. Guard on the id: a payload for a
+        // pass renders identically without a second round-trip. Guard on the key: a payload for a
         // different release must not seed this page (stale-bridge bleed across navigation).
         if (PersistentState.TryTakeFromJson<BridgedDetail>(PersistKey, out var restored)
             && restored?.Release is not null
-            && restored.Release.Id == Id)
+            && restored.Release.EntryKey == EntryKey)
         {
             ViewModel.Restore(restored.Release, restored.Track);
         }
         else
         {
-            await ViewModel.Load(Id);
+            await ViewModel.Load(EntryKey);
         }
     }
 
diff --git a/DeepDrftPublic.Client/Pages/SessionDetail.razor b/DeepDrftPublic.Client/Pages/SessionDetail.razor
index f9d23af..f23b4c6 100644
--- a/DeepDrftPublic.Client/Pages/SessionDetail.razor
+++ b/DeepDrftPublic.Client/Pages/SessionDetail.razor
@@ -1,4 +1,4 @@
-@page "/sessions/{Id:long}"
+@page "/sessions/{EntryKey}"
 @using DeepDrftModels.DTOs
 @using DeepDrftPublic.Client.Controls
 @using DeepDrftPublic.Client.Services
diff --git a/DeepDrftPublic.Client/Pages/TrackRedirect.razor b/DeepDrftPublic.Client/Pages/TrackRedirect.razor
index 845f0ea..c285512 100644
--- a/DeepDrftPublic.Client/Pages/TrackRedirect.razor
+++ b/DeepDrftPublic.Client/Pages/TrackRedirect.razor
@@ -1,25 +1,26 @@
-@page "/tracks/{Id:long}"
+@page "/tracks/{EntryKey}"
 @using DeepDrftPublic.Client.Services
 @inject IReleaseDataService ReleaseData
 @inject NavigationManager Navigation
 
-@* Addressable deep-link fallback for a bare release id (Phase 11 §2, shape iii). Unlike the player
-   bar / Archive / AlbumsView call sites, an external /tracks/{id} link carries only the id, so this
-   page fetches the release to discover its medium, then forwards through the same ReleaseRoutes
-   resolver — one medium→route table, no second source. replace:true keeps the router out of history
-   so Back skips this hop. Capture Id before the await per the InteractiveAuto route-param convention. *@
+@* Addressable deep-link fallback for a bare release EntryKey (Phase 11 §2, shape iii). Unlike the
+   player bar / Archive / AlbumsView call sites, an external /tracks/{entryKey} link carries only the
+   key, so this page fetches the release to discover its medium, then forwards through the same
+   ReleaseRoutes resolver — one medium→route table, no second source. replace:true keeps the router
+   out of history so Back skips this hop. Capture EntryKey before the await per the InteractiveAuto
+   route-param convention. *@
 
 @code {
-    [Parameter] public long Id { get; set; }
+    [Parameter] public string EntryKey { get; set; } = string.Empty;
 
     protected override async Task OnParametersSetAsync()
     {
-        var id = Id;
-        var result = await ReleaseData.GetById(id);
+        var entryKey = EntryKey;
+        var result = await ReleaseData.GetByEntryKey(entryKey);
 
         var target = result is { Success: true, Value: { } release }
             ? ReleaseRoutes.DetailHref(release)
-            : "/cuts"; // Unknown id: fall back to the Cuts gallery rather than 404.
+            : "/cuts"; // Unknown key: fall back to the Cuts gallery rather than 404.
 
         Navigation.NavigateTo(target, forceLoad: false, replace: true);
     }
diff --git a/DeepDrftPublic.Client/Services/IReleaseDataService.cs b/DeepDrftPublic.Client/Services/IReleaseDataService.cs
index 0ecee43..b1db0bc 100644
--- a/DeepDrftPublic.Client/Services/IReleaseDataService.cs
+++ b/DeepDrftPublic.Client/Services/IReleaseDataService.cs
@@ -22,12 +22,13 @@ public interface IReleaseDataService
         string? search = null,
         string? genre = null);
 
-    /// <summary>Single release with both metadata satellites (nulls for non-matching media).</summary>
-    Task<ApiResult<ReleaseDto>> GetById(long id);
+    /// <summary>Single release resolved by its opaque public EntryKey, with both metadata satellites (nulls for non-matching media).</summary>
+    Task<ApiResult<ReleaseDto>> GetByEntryKey(string entryKey);
 
     /// <summary>
-    /// The Mix waveform datum. Success with a value when present; success with a null value when
-    /// no datum is stored (a valid state, not a failure); failure on any other transport error.
+    /// The Mix waveform datum for a release addressed by its public EntryKey. Success with a value
+    /// when present; success with a null value when no datum is stored (a valid state, not a failure);
+    /// failure on any other transport error.
     /// </summary>
-    Task<ApiResult<WaveformProfileDto?>> GetMixWaveform(long id);
+    Task<ApiResult<WaveformProfileDto?>> GetMixWaveform(string entryKey);
 }
diff --git a/DeepDrftPublic.Client/Services/ReleaseClientDataService.cs b/DeepDrftPublic.Client/Services/ReleaseClientDataService.cs
index 637a2d0..4f85502 100644
--- a/DeepDrftPublic.Client/Services/ReleaseClientDataService.cs
+++ b/DeepDrftPublic.Client/Services/ReleaseClientDataService.cs
@@ -29,9 +29,9 @@ public class ReleaseClientDataService : IReleaseDataService
         string? genre = null)
         => _releaseClient.GetPaged(medium, page, pageSize, sortColumn, sortDescending, search, genre);
 
-    public Task<ApiResult<ReleaseDto>> GetById(long id)
-        => _releaseClient.GetById(id);
+    public Task<ApiResult<ReleaseDto>> GetByEntryKey(string entryKey)
+        => _releaseClient.GetByEntryKey(entryKey);
 
-    public Task<ApiResult<WaveformProfileDto?>> GetMixWaveform(long id)
-        => _releaseClient.GetMixWaveform(id);
+    public Task<ApiResult<WaveformProfileDto?>> GetMixWaveform(string entryKey)
+        => _releaseClient.GetMixWaveform(entryKey);
 }
diff --git a/DeepDrftPublic.Client/ViewModels/CutDetailViewModel.cs b/DeepDrftPublic.Client/ViewModels/CutDetailViewModel.cs
index 3fd1342..1578dca 100644
--- a/DeepDrftPublic.Client/ViewModels/CutDetailViewModel.cs
+++ b/DeepDrftPublic.Client/ViewModels/CutDetailViewModel.cs
@@ -4,7 +4,7 @@ using DeepDrftPublic.Client.Services;
 namespace DeepDrftPublic.Client.ViewModels;
 
 /// <summary>
-/// State for the Cut album-detail page (/cuts/{id}). Unlike <see cref="ReleaseDetailViewModel"/>
+/// State for the Cut album-detail page (/cuts/{entryKey}). Unlike <see cref="ReleaseDetailViewModel"/>
 /// (which resolves a single playable track for Session/Mix), a Cut is multi-track: it loads the
 /// release and the full ordered track list for that release. The list is fetched through the
 /// existing releaseId-filtered track page sorted by TrackNumber — the explicit 1-based ordinal
@@ -40,7 +40,7 @@ public class CutDetailViewModel
         IsLoading = false;
     }
 
-    public async Task Load(long releaseId)
+    public async Task Load(string entryKey)
     {
         IsLoading = true;
         NotFound = false;
@@ -49,7 +49,7 @@ public class CutDetailViewModel
 
         try
         {
-            var releaseResult = await _releaseData.GetById(releaseId);
+            var releaseResult = await _releaseData.GetByEntryKey(entryKey);
             if (releaseResult is not { Success: true, Value: { } release })
             {
                 NotFound = true;
@@ -59,9 +59,11 @@ public class CutDetailViewModel
             Release = release;
 
             // The album's tracks via the releaseId-filtered page — an exact join, not a title string
-            // (which collides across same-titled releases and breaks on rename). Sorted by TrackNumber
-            // so rows render in saved order. A Cut with no streamable tracks simply leaves the list
-            // empty (the page renders the header with no rows).
+            // (which collides across same-titled releases and breaks on rename). The public page
+            // addresses the release by EntryKey; the track→release join stays on the internal int FK
+            // (Phase 11 §3e), so use the resolved release.Id here. Sorted by TrackNumber so rows render
+            // in saved order. A Cut with no streamable tracks simply leaves the list empty (the page
+            // renders the header with no rows).
             var trackResult = await _trackData.GetPage(
                 pageNumber: 1,
                 pageSize: AlbumPageSize,
diff --git a/DeepDrftPublic.Client/ViewModels/ReleaseDetailViewModel.cs b/DeepDrftPublic.Client/ViewModels/ReleaseDetailViewModel.cs
index 4a88569..078ac98 100644
--- a/DeepDrftPublic.Client/ViewModels/ReleaseDetailViewModel.cs
+++ b/DeepDrftPublic.Client/ViewModels/ReleaseDetailViewModel.cs
@@ -35,7 +35,7 @@ public class ReleaseDetailViewModel
         IsLoading = false;
     }
 
-    public async Task Load(long releaseId)
+    public async Task Load(string entryKey)
     {
         IsLoading = true;
         NotFound = false;
@@ -44,7 +44,7 @@ public class ReleaseDetailViewModel
 
         try
         {
-            var releaseResult = await _releaseData.GetById(releaseId);
+            var releaseResult = await _releaseData.GetByEntryKey(entryKey);
             if (releaseResult is not { Success: true, Value: { } release })
             {
                 NotFound = true;
@@ -54,9 +54,11 @@ public class ReleaseDetailViewModel
             Release = release;
 
             // Resolve the playable track via the releaseId-filtered track page — an exact join, not a
-            // title string (which collides across same-titled releases and breaks on rename). Session/Mix
-            // releases carry a single track; take the first. A release with no streamable track simply
-            // leaves Track null (the detail page hides the play affordance).
+            // title string (which collides across same-titled releases and breaks on rename). The public
+            // page addresses the release by EntryKey; the track→release join stays on the internal int
+            // FK (Phase 11 §3e leaves internal joins on the int PK), so use the resolved release.Id here.
+            // Session/Mix releases carry a single track; take the first. A release with no streamable
+            // track simply leaves Track null (the detail page hides the play affordance).
             var trackResult = await _trackData.GetPage(
                 pageNumber: 1, pageSize: 1, releaseId: release.Id);
             if (trackResult is { Success: true, Value: { Items: { } items } })
diff --git a/DeepDrftPublic/Controllers/ReleaseProxyController.cs b/DeepDrftPublic/Controllers/ReleaseProxyController.cs
index 764d2d2..5e4f28d 100644
--- a/DeepDrftPublic/Controllers/ReleaseProxyController.cs
+++ b/DeepDrftPublic/Controllers/ReleaseProxyController.cs
@@ -47,15 +47,15 @@ public class ReleaseProxyController : ControllerBase
         return await RelayJson(query, "release list");
     }
 
-    /// <summary>Proxies the Mix waveform datum. A 404 (no datum stored) passes through verbatim.</summary>
-    [HttpGet("{id:long}/mix/waveform")]
-    public async Task<ActionResult> GetMixWaveform(long id, CancellationToken ct = default)
-        => await RelayJson($"api/release/{id}/mix/waveform", $"release {id} mix waveform", ct);
+    /// <summary>Proxies the Mix waveform datum, addressed by the release's opaque EntryKey. A 404 (no datum stored) passes through verbatim.</summary>
+    [HttpGet("{entryKey}/mix/waveform")]
+    public async Task<ActionResult> GetMixWaveform(string entryKey, CancellationToken ct = default)
+        => await RelayJson($"api/release/{Uri.EscapeDataString(entryKey)}/mix/waveform", $"release {entryKey} mix waveform", ct);
 
-    /// <summary>Proxies a single release. A 404 (no such release) passes through verbatim.</summary>
-    [HttpGet("{id:long}")]
-    public async Task<ActionResult> GetReleaseById(long id, CancellationToken ct = default)
-        => await RelayJson($"api/release/{id}", $"release {id}", ct);
+    /// <summary>Proxies a single release, addressed by its opaque EntryKey. A 404 (no such release) passes through verbatim.</summary>
+    [HttpGet("{entryKey}")]
+    public async Task<ActionResult> GetReleaseByEntryKey(string entryKey, CancellationToken ct = default)
+        => await RelayJson($"api/release/{Uri.EscapeDataString(entryKey)}", $"release {entryKey}", ct);
 
     // Small JSON payloads, buffered and relayed. Non-success statuses (notably 404) pass through
     // so the client renders them as valid states rather than collapsing to a 502.
diff --git a/DeepDrftTests/CutDetailTrackOrderingTests.cs b/DeepDrftTests/CutDetailTrackOrderingTests.cs
index 0e8e966..f3cd85c 100644
--- a/DeepDrftTests/CutDetailTrackOrderingTests.cs
+++ b/DeepDrftTests/CutDetailTrackOrderingTests.cs
@@ -43,7 +43,7 @@ public class CutDetailTrackOrderingTests
         => new(_context, NullLogger<Repository<DeepDrftContext, TrackEntity>>.Instance);
 
     private static ReleaseEntity Release(string title, string artist)
-        => new() { Title = title, Artist = artist };
+        => new() { EntryKey = Guid.NewGuid().ToString("N"), Title = title, Artist = artist };
 
     // A track linked to the given release with an explicit ordinal.
     private static TrackEntity Track(string name, int trackNumber, ReleaseEntity? release = null)
diff --git a/DeepDrftTests/MediumWritePathTests.cs b/DeepDrftTests/MediumWritePathTests.cs
index a56e647..e672d94 100644
--- a/DeepDrftTests/MediumWritePathTests.cs
+++ b/DeepDrftTests/MediumWritePathTests.cs
@@ -122,7 +122,7 @@ public class MediumWritePathTests
 
         var release = new ReleaseEntity
         {
-            Title = "Originally a Cut", Artist = "Artist A",
+            EntryKey = "rk-flip", Title = "Originally a Cut", Artist = "Artist A",
             Medium = ReleaseMedium.Cut, ReleaseType = ReleaseType.EP,
         };
         var track = new TrackEntity { EntryKey = "ek-1", TrackName = "Track", Release = release };
@@ -151,7 +151,7 @@ public class MediumWritePathTests
     {
         var sessionWithStaleType = new ReleaseEntity
         {
-            Title = "Session", Artist = "A",
+            EntryKey = "rk-stale", Title = "Session", Artist = "A",
             Medium = ReleaseMedium.Session, ReleaseType = ReleaseType.Album,
         };
 
@@ -169,7 +169,7 @@ public class MediumWritePathTests
         const string prose = "A late-night set\nrecorded at the Vault.";
         var entity = new ReleaseEntity
         {
-            Title = "Live at the Vault", Artist = "Artist A",
+            EntryKey = "rk-desc", Title = "Live at the Vault", Artist = "Artist A",
             Medium = ReleaseMedium.Session, Description = prose,
         };
 
@@ -184,7 +184,7 @@ public class MediumWritePathTests
     [Test]
     public void Convert_NullDescription_RoundTripsAsNull()
     {
-        var entity = new ReleaseEntity { Title = "Studio Album", Artist = "Artist C", Description = null };
+        var entity = new ReleaseEntity { EntryKey = "rk-nulldesc", Title = "Studio Album", Artist = "Artist C", Description = null };
 
         var dto = TrackConverter.Convert(entity);
         Assert.That(dto.Description, Is.Null);
@@ -222,7 +222,7 @@ public class MediumWritePathTests
         var repo = CreateRepository();
         ITrackService manager = CreateManager(repo);
 
-        var release = new ReleaseEntity { Title = "Studio Album", Artist = "Artist C", Medium = ReleaseMedium.Cut };
+        var release = new ReleaseEntity { EntryKey = "rk-editdesc", Title = "Studio Album", Artist = "Artist C", Medium = ReleaseMedium.Cut };
         var track = new TrackEntity { EntryKey = "ek-1", TrackName = "Track", Release = release };
         _context.Tracks.Add(track);
         await _context.SaveChangesAsync();
@@ -242,8 +242,8 @@ public class MediumWritePathTests
     [Test]
     public async Task GetPagedFilteredAsync_WithReleaseId_ReturnsOnlyThatReleasesTracks()
     {
-        var first = new ReleaseEntity { Title = "Untitled", Artist = "Artist A" };
-        var second = new ReleaseEntity { Title = "Untitled", Artist = "Artist B" };
+        var first = new ReleaseEntity { EntryKey = "rk-first", Title = "Untitled", Artist = "Artist A" };
+        var second = new ReleaseEntity { EntryKey = "rk-second", Title = "Untitled", Artist = "Artist B" };
         _context.Tracks.AddRange(
             new TrackEntity { EntryKey = "a1", TrackName = "A-One", Release = first },
             new TrackEntity { EntryKey = "a2", TrackName = "A-Two", Release = first },
@@ -264,8 +264,8 @@ public class MediumWritePathTests
     [Test]
     public async Task GetPagedFilteredAsync_SameTitledReleases_ResolveDistinctlyById()
     {
-        var first = new ReleaseEntity { Title = "Untitled", Artist = "Artist A" };
-        var second = new ReleaseEntity { Title = "Untitled", Artist = "Artist B" };
+        var first = new ReleaseEntity { EntryKey = "rk-first2", Title = "Untitled", Artist = "Artist A" };
+        var second = new ReleaseEntity { EntryKey = "rk-second2", Title = "Untitled", Artist = "Artist B" };
         _context.Tracks.AddRange(
             new TrackEntity { EntryKey = "a1", TrackName = "A-One", Release = first },
             new TrackEntity { EntryKey = "b1", TrackName = "B-One", Release = second });
@@ -333,7 +333,7 @@ public class MediumWritePathTests
         var repo = CreateRepository();
         ITrackService manager = CreateManager(repo);
 
-        var release = new ReleaseEntity { Title = "Live at the Vault", Artist = "Artist A", Medium = ReleaseMedium.Session };
+        var release = new ReleaseEntity { EntryKey = "rk-peek", Title = "Live at the Vault", Artist = "Artist A", Medium = ReleaseMedium.Session };
         _context.Tracks.Add(new TrackEntity { EntryKey = "ek-1", TrackName = "Track One", Release = release });
         await _context.SaveChangesAsync();
 
@@ -370,7 +370,7 @@ public class MediumWritePathTests
         var repo = CreateRepository();
         ITrackService manager = CreateManager(repo);
 
-        var release = new ReleaseEntity { Title = "Live at the Vault", Artist = "Artist A", Medium = ReleaseMedium.Session };
+        var release = new ReleaseEntity { EntryKey = "rk-cardses", Title = "Live at the Vault", Artist = "Artist A", Medium = ReleaseMedium.Session };
         _context.Tracks.Add(new TrackEntity { EntryKey = "ek-1", TrackName = "Track One", Release = release });
         await _context.SaveChangesAsync();
 
@@ -387,7 +387,7 @@ public class MediumWritePathTests
         var repo = CreateRepository();
         ITrackService manager = CreateManager(repo);
 
-        var release = new ReleaseEntity { Title = "Sunset Set", Artist = "DJ B", Medium = ReleaseMedium.Mix };
+        var release = new ReleaseEntity { EntryKey = "rk-cardmix", Title = "Sunset Set", Artist = "DJ B", Medium = ReleaseMedium.Mix };
         _context.Tracks.Add(new TrackEntity { EntryKey = "ek-1", TrackName = "The Set", Release = release });
         await _context.SaveChangesAsync();
 
@@ -404,7 +404,7 @@ public class MediumWritePathTests
         var repo = CreateRepository();
         ITrackService manager = CreateManager(repo);
 
-        var release = new ReleaseEntity { Title = "Studio Album", Artist = "Artist C", Medium = ReleaseMedium.Cut };
+        var release = new ReleaseEntity { EntryKey = "rk-cardcut", Title = "Studio Album", Artist = "Artist C", Medium = ReleaseMedium.Cut };
         _context.Tracks.AddRange(
             new TrackEntity { EntryKey = "c1", TrackName = "One", Release = release },
             new TrackEntity { EntryKey = "c2", TrackName = "Two", Release = release },
diff --git a/DeepDrftTests/ReleaseBrowseQueryTests.cs b/DeepDrftTests/ReleaseBrowseQueryTests.cs
index ddcd7ec..e2045c6 100644
--- a/DeepDrftTests/ReleaseBrowseQueryTests.cs
+++ b/DeepDrftTests/ReleaseBrowseQueryTests.cs
@@ -46,6 +46,7 @@ public class ReleaseBrowseQueryTests
         string title, string artist, ReleaseMedium medium = ReleaseMedium.Cut, string? genre = null)
         => new()
         {
+            EntryKey = Guid.NewGuid().ToString("N"),
             Title = title,
             Artist = artist,
             Medium = medium,
diff --git a/DeepDrftTests/ReleaseRoutesTests.cs b/DeepDrftTests/ReleaseRoutesTests.cs
index f94957b..b84c2e5 100644
--- a/DeepDrftTests/ReleaseRoutesTests.cs
+++ b/DeepDrftTests/ReleaseRoutesTests.cs
@@ -6,31 +6,35 @@ namespace DeepDrftTests;
 
 /// <summary>
 /// The medium→detail-route table is the single source of truth for release navigation (Phase 11
-/// §2): Archive cards, AlbumsView cards, the player-bar title, and the /tracks/{id} redirect page
-/// all resolve through <see cref="ReleaseRoutes.DetailHref(long, ReleaseMedium)"/>. These tests pin
-/// each medium to its dedicated route and confirm the DTO overload (the call shape used everywhere
-/// but the redirect page) agrees with the primitive overload (the shape the redirect page uses
-/// after fetching the release by id).
+/// §2, §3e): Archive cards, AlbumsView cards, the player-bar title, and the /tracks/{entryKey}
+/// redirect page all resolve through <see cref="ReleaseRoutes.DetailHref(string, ReleaseMedium)"/>.
+/// The route now carries the release's opaque public EntryKey (a GUID string), never the int PK.
+/// These tests pin each medium to its dedicated route and confirm the DTO overload (the call shape
+/// used everywhere but the redirect page) agrees with the primitive overload (the shape the redirect
+/// page uses after fetching the release by EntryKey).
 /// </summary>
 [TestFixture]
 public class ReleaseRoutesTests
 {
-    [TestCase(ReleaseMedium.Cut, "/cuts/42")]
-    [TestCase(ReleaseMedium.Session, "/sessions/42")]
-    [TestCase(ReleaseMedium.Mix, "/mixes/42")]
+    private const string Key = "9f8a3c2e-key";
+
+    [TestCase(ReleaseMedium.Cut, "/cuts/9f8a3c2e-key")]
+    [TestCase(ReleaseMedium.Session, "/sessions/9f8a3c2e-key")]
+    [TestCase(ReleaseMedium.Mix, "/mixes/9f8a3c2e-key")]
     public void DetailHref_ResolvesEachMediumToItsDedicatedRoute(ReleaseMedium medium, string expected)
     {
-        Assert.That(ReleaseRoutes.DetailHref(42, medium), Is.EqualTo(expected));
+        Assert.That(ReleaseRoutes.DetailHref(Key, medium), Is.EqualTo(expected));
     }
 
-    [TestCase(ReleaseMedium.Cut, "/cuts/7")]
-    [TestCase(ReleaseMedium.Session, "/sessions/7")]
-    [TestCase(ReleaseMedium.Mix, "/mixes/7")]
+    [TestCase(ReleaseMedium.Cut, "/cuts/9f8a3c2e-key")]
+    [TestCase(ReleaseMedium.Session, "/sessions/9f8a3c2e-key")]
+    [TestCase(ReleaseMedium.Mix, "/mixes/9f8a3c2e-key")]
     public void DetailHref_DtoOverload_AgreesWithPrimitiveOverload(ReleaseMedium medium, string expected)
     {
         // The redirect page resolves a fetched ReleaseDto through this overload; every other call
-        // site does too. It must produce the same route as the (id, medium) primitive.
-        var release = new ReleaseDto { Id = 7, Medium = medium };
+        // site does too. It must read EntryKey and produce the same route as the (entryKey, medium)
+        // primitive — a regression to release.Id here would re-expose the transparent int (§3e).
+        var release = new ReleaseDto { EntryKey = Key, Medium = medium };
 
         Assert.That(ReleaseRoutes.DetailHref(release), Is.EqualTo(expected));
     }
@@ -43,7 +47,7 @@ public class ReleaseRoutesTests
         // route — a fourth medium lacking a route arm fails here rather than mis-routing to /cuts.
         foreach (var medium in Enum.GetValues<ReleaseMedium>().Where(m => m != ReleaseMedium.Cut))
         {
-            var href = ReleaseRoutes.DetailHref(1, medium);
+            var href = ReleaseRoutes.DetailHref(Key, medium);
             Assert.That(href, Does.Not.StartWith("/cuts/"),
                 $"Medium {medium} fell through to the Cut default arm ('{href}') — it needs its own route.");
         }
diff --git a/DeepDrftTests/TrackFilterQueryTests.cs b/DeepDrftTests/TrackFilterQueryTests.cs
index 43146e6..3a71b98 100644
--- a/DeepDrftTests/TrackFilterQueryTests.cs
+++ b/DeepDrftTests/TrackFilterQueryTests.cs
@@ -50,6 +50,7 @@ public class TrackFilterQueryTests
         string title, string artist, string? genre = null, string? image = null)
         => new()
         {
+            EntryKey = Guid.NewGuid().ToString("N"),
             Title = title,
             Artist = artist,
             Genre = genre,