diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d9935f19..ef149e8c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -308,6 +308,10 @@ jobs:
         with:
           packages: tools platform-tools platforms;android-35 build-tools;35.0.0
 
+      - name: Run tests
+        working-directory: kotlin/
+        run: gradle bindings:test
+
       - name: Build Kotlin sample app
         working-directory: kotlin/Examples/IDKitSampleApp
         run: ./gradlew :app:assembleDebug
diff --git a/kotlin/Examples/IDKitSampleApp/app/src/main/java/com/worldcoin/idkit/sample/MainActivity.kt b/kotlin/Examples/IDKitSampleApp/app/src/main/java/com/worldcoin/idkit/sample/MainActivity.kt
index 57957a5d..85e0c56a 100644
--- a/kotlin/Examples/IDKitSampleApp/app/src/main/java/com/worldcoin/idkit/sample/MainActivity.kt
+++ b/kotlin/Examples/IDKitSampleApp/app/src/main/java/com/worldcoin/idkit/sample/MainActivity.kt
@@ -36,6 +36,7 @@ import com.worldcoin.idkit.IDKitRequestConfig
 import com.worldcoin.idkit.documentLegacy
 import com.worldcoin.idkit.idkitResultToJson
 import com.worldcoin.idkit.deviceLegacy
+import com.worldcoin.idkit.identityCheck
 import com.worldcoin.idkit.orbLegacy
 import com.worldcoin.idkit.secureDocumentLegacy
 import com.worldcoin.idkit.selfieCheckLegacy
@@ -53,7 +54,9 @@ import okhttp3.Request
 import okhttp3.RequestBody.Companion.toRequestBody
 import org.json.JSONArray
 import org.json.JSONObject
+import uniffi.idkit_core.DocumentType
 import uniffi.idkit_core.Environment
+import uniffi.idkit_core.IdentityAttribute
 import uniffi.idkit_core.RpContext
 
 class MainActivity : ComponentActivity() {
@@ -239,7 +242,7 @@ private fun LegacyPresetSelector(
     onSelect: (SampleLegacyPreset) -> Unit,
 ) {
     Column(verticalArrangement = Arrangement.spacedBy(6.dp)) {
-        Text("Legacy preset", style = MaterialTheme.typography.labelLarge)
+        Text("Preset", style = MaterialTheme.typography.labelLarge)
 
         SampleLegacyPreset.entries
             .chunked(2)
@@ -281,6 +284,7 @@ private enum class SampleLegacyPreset(val label: String) {
     DOCUMENT("document"),
     DEVICE("device"),
     SELFIE_CHECK("selfie check"),
+    IDENTITY_CHECK("identity check"),
     ;
 
     fun toPreset(signal: String) = when (this) {
@@ -289,6 +293,13 @@ private enum class SampleLegacyPreset(val label: String) {
         DOCUMENT -> documentLegacy(signal = signal)
         DEVICE -> deviceLegacy(signal = signal)
         SELFIE_CHECK -> selfieCheckLegacy(signal = signal)
+        IDENTITY_CHECK -> identityCheck(
+            attributes = listOf(
+                IdentityAttribute.MinimumAge(21u),
+                IdentityAttribute.Nationality("JPN"),
+                IdentityAttribute.DocumentType(DocumentType.PASSPORT),
+            ),
+        )
     }
 }
 
@@ -366,7 +377,7 @@ private class SampleModel {
                 deepLinkReceivedForPendingRequest = false
 
                 android.util.Log.i("IDKitSample", "IDKit connector URL: ${request.connectorURI}")
-                log("Using legacy preset: ${legacyPreset.label}")
+                log("Using preset: ${legacyPreset.label}")
                 log("Generated request ID: ${request.requestId}")
                 log("Configured return_to callback: $returnToURL")
                 startPollingForRequest(
diff --git a/kotlin/README.md b/kotlin/README.md
index 06b56991..ee239c45 100644
--- a/kotlin/README.md
+++ b/kotlin/README.md
@@ -63,9 +63,12 @@ import com.worldcoin.idkit.IDKit
 import com.worldcoin.idkit.IDKitPollOptions
 import com.worldcoin.idkit.IDKitRequestConfig
 import com.worldcoin.idkit.IDKitCompletionResult
+import com.worldcoin.idkit.IdentityAttribute
 import com.worldcoin.idkit.selfieCheckLegacy
+import com.worldcoin.idkit.identityCheck
 import com.worldcoin.idkit.orbLegacy
 import com.worldcoin.idkit.deviceLegacy
+import uniffi.idkit_core.DocumentType
 import uniffi.idkit_core.Environment
 import uniffi.idkit_core.RpContext
 
@@ -117,6 +120,22 @@ val request = IDKit
     .preset(selfieCheckLegacy(signal = "user-123"))
 ```
 
+For document-based identity attestation, use:
+
+```kotlin
+val request = IDKit
+    .request(config)
+    .preset(
+        identityCheck(
+            attributes = listOf(
+                IdentityAttribute.MinimumAge(21u),
+                IdentityAttribute.Nationality("JPN"),
+                IdentityAttribute.DocumentType(DocumentType.PASSPORT),
+            ),
+        ),
+    )
+```
+
 ## Credential request options parity
 
 ```kotlin
diff --git a/kotlin/bindings/build.gradle.kts b/kotlin/bindings/build.gradle.kts
index bbc15b0d..aecc07b9 100644
--- a/kotlin/bindings/build.gradle.kts
+++ b/kotlin/bindings/build.gradle.kts
@@ -33,6 +33,13 @@ android {
             withSourcesJar()
         }
     }
+
+    testOptions {
+        unitTests.all { test ->
+            val rustLibDir = project.projectDir.resolve("../../target/release").canonicalPath
+            test.jvmArgs("-Djna.library.path=$rustLibDir")
+        }
+    }
 }
 
 dependencies {
@@ -42,6 +49,8 @@ dependencies {
     implementation(kotlin("stdlib"))
 
     testImplementation(kotlin("test"))
+    // The @aar variant doesn't bundle libjnidispatch — use the plain JVM jar for unit tests
+    testImplementation("net.java.dev.jna:jna:5.14.0")
 }
 
 afterEvaluate {
diff --git a/kotlin/bindings/src/main/kotlin/com/worldcoin/idkit/IdKit.kt b/kotlin/bindings/src/main/kotlin/com/worldcoin/idkit/IdKit.kt
index 5b8591ab..4cd60d49 100644
--- a/kotlin/bindings/src/main/kotlin/com/worldcoin/idkit/IdKit.kt
+++ b/kotlin/bindings/src/main/kotlin/com/worldcoin/idkit/IdKit.kt
@@ -37,6 +37,8 @@ typealias IDKitRequestConfig = IdKitRequestConfig
 typealias IDKitResult = IdKitResult
 typealias RpContext = uniffi.idkit_core.RpContext
 typealias Environment = uniffi.idkit_core.Environment
+typealias DocumentType = uniffi.idkit_core.DocumentType
+typealias IdentityAttribute = uniffi.idkit_core.IdentityAttribute
 
 class IDKitClientError(message: String) : IllegalArgumentException(message)
 
@@ -333,6 +335,13 @@ fun deviceLegacy(signal: String? = null): Preset = Preset.DeviceLegacy(signal =
  */
 fun selfieCheckLegacy(signal: String? = null): Preset = Preset.SelfieCheckLegacy(signal = signal)
 
+/**
+ * Returns the identity check preset.
+ *
+ * This preset requires World ID 4.0-compatible clients.
+ */
+fun identityCheck(attributes: List<IdentityAttribute>): Preset = Preset.IdentityCheck(attributes = attributes)
+
 fun idkitResultToJson(result: IDKitResult): String = nativeIdkitResultToJson(result)
 
 fun idkitResultFromJson(json: String): IDKitResult = nativeIdkitResultFromJson(json)
diff --git a/kotlin/bindings/src/test/kotlin/com/worldcoin/idkit/IDKitTests.kt b/kotlin/bindings/src/test/kotlin/com/worldcoin/idkit/IDKitTests.kt
index da50115e..8c408f20 100644
--- a/kotlin/bindings/src/test/kotlin/com/worldcoin/idkit/IDKitTests.kt
+++ b/kotlin/bindings/src/test/kotlin/com/worldcoin/idkit/IDKitTests.kt
@@ -7,9 +7,12 @@ import kotlin.test.assertEquals
 import kotlin.test.assertNotEquals
 import kotlin.test.assertTrue
 import uniffi.idkit_core.AppError
+import uniffi.idkit_core.ConnectUrlMode
 // TODO: Re-enable when World ID 4.0 is live
 // import uniffi.idkit_core.CredentialType
+import uniffi.idkit_core.DocumentType
 import uniffi.idkit_core.Environment
+import uniffi.idkit_core.IdentityAttribute
 import uniffi.idkit_core.Preset
 import uniffi.idkit_core.ResponseItem
 import uniffi.idkit_core.RpContext
@@ -25,6 +28,7 @@ class IDKitTests {
             sessionId = sessionId,
             responses = emptyList<ResponseItem>(),
             environment = "production",
+            identityAttested = null,
         )
 
     private fun sampleRpContext(): RpContext {
@@ -50,6 +54,7 @@ class IDKitTests {
             overrideConnectBaseUrl = null,
             returnTo = null,
             environment = Environment.STAGING,
+            connectUrlMode = ConnectUrlMode.DEFAULT,
         )
 
         // TODO: Re-enable when World ID 4.0 is live
@@ -291,11 +296,25 @@ class IDKitTests {
         assertTrue(doc is Preset.DocumentLegacy)
         assertTrue(device is Preset.DeviceLegacy)
         assertTrue(face is Preset.SelfieCheckLegacy)
-        assertEquals("x", (orb as Preset.OrbLegacy).signal)
-        assertEquals("y", (secureDoc as Preset.SecureDocumentLegacy).signal)
-        assertEquals("z", (doc as Preset.DocumentLegacy).signal)
-        assertEquals("d", (device as Preset.DeviceLegacy).signal)
-        assertEquals("f", (face as Preset.SelfieCheckLegacy).signal)
+        assertEquals("x", (orb).signal)
+        assertEquals("y", (secureDoc).signal)
+        assertEquals("z", (doc).signal)
+        assertEquals("d", (device).signal)
+        assertEquals("f", (face).signal)
+    }
+
+    @Test
+    fun `identityCheck helper exposes canonical preset`() {
+        val attributes = listOf(
+            IdentityAttribute.MinimumAge(21u),
+            IdentityAttribute.Nationality("JPN"),
+            IdentityAttribute.DocumentType(DocumentType.PASSPORT),
+        )
+
+        val preset = identityCheck(attributes = attributes)
+
+        assertTrue(preset is Preset.IdentityCheck)
+        assertEquals(attributes, preset.attributes)
     }
 
     @Test
diff --git a/scripts/build-kotlin.sh b/scripts/build-kotlin.sh
index 6dc13321..ade12e5e 100755
--- a/scripts/build-kotlin.sh
+++ b/scripts/build-kotlin.sh
@@ -20,6 +20,9 @@ esac
 
 HOST_LIB="$PROJECT_ROOT/target/release/libidkit.$LIB_EXT"
 
+echo "🎯 Installing Android Rust targets"
+rustup target add aarch64-linux-android armv7-linux-androideabi x86_64-linux-android i686-linux-android >/dev/null
+
 echo "🔧 Building Rust library (host) for binding generation"
 CARGO_PROFILE_RELEASE_STRIP=none cargo build --package idkit-core --release --locked --features uniffi-bindings
 
@@ -32,8 +35,12 @@ CARGO_PROFILE_RELEASE_STRIP=none cargo run -p uniffi-bindgen generate \
 
 if [ -n "${CI:-}" ]; then
   echo "🧹 Cleaning host build artifacts to free disk space for Android builds"
+  # Preserve the host library — JVM unit tests need it via jna.library.path
+  cp "$HOST_LIB" "/tmp/libidkit.$LIB_EXT"
   cargo clean --package idkit-core --release || true
   rm -rf ~/.cargo/registry/cache || true
+  mkdir -p "$(dirname "$HOST_LIB")"
+  mv "/tmp/libidkit.$LIB_EXT" "$HOST_LIB"
 fi
 
 echo "🤖 Building Android ABIs"