diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
new file mode 100644
index 000000000..cf5b02354
--- /dev/null
+++ b/.github/workflows/validate.yml
@@ -0,0 +1,23 @@
+name: validate
+
+on:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    env:
+      BUNDLE_WITH: test jekyll_plugins
+      SITE_ID:  'cookbook' # which iiif site this is
+      URL: 'https://preview.iiif.io'
+
+    steps:
+      - name: Check out this repository
+        uses: actions/checkout@v5
+
+      - name: Run IIIF validator
+        uses: IIIF/presentation-validator@main
+        with:
+          directory: source/presentation/4.0/example/
+          version: "4.0"
diff --git a/source/presentation/4.0/example/uc06_canvas_in_scene.json b/source/presentation/4.0/example/uc06_canvas_in_scene.json
index 8f83ab5e8..a72177d3f 100644
--- a/source/presentation/4.0/example/uc06_canvas_in_scene.json
+++ b/source/presentation/4.0/example/uc06_canvas_in_scene.json
@@ -54,7 +54,10 @@
                                                         "width": 800,
                                                         "height": 800
                                                     },
-                                                    "target": "https://iiif.io/api/presentation/4.0/example/uc06/canvas/chessboard"
+                                                    "target": {
+                                                        "id": "https://iiif.io/api/presentation/4.0/example/uc06/canvas/chessboard",
+                                                        "type": "Canvas"
+                                                    }
                                                 }
                                             ]
                                         }
diff --git a/source/presentation/4.0/example/uc06_scene_in_scene.json b/source/presentation/4.0/example/uc06_scene_in_scene.json
index 1442451aa..0a25c691b 100644
--- a/source/presentation/4.0/example/uc06_scene_in_scene.json
+++ b/source/presentation/4.0/example/uc06_scene_in_scene.json
@@ -19,7 +19,34 @@
                             "motivation": [ "painting" ],
                             "body": {
                                 "id": "https://iiif.io/api/presentation/4.0/example/uc06/scene/1",
-                                "type": "Scene"
+                                "type": "Scene",
+                                "label": {
+                                    "en": [
+                                        "Chess Pawn"
+                                    ]
+                                },
+                                "items": [
+                                    {
+                                        "id": "https://iiif.io/api/presentation/4.0/example/uc06/scene/1/page/1",
+                                        "type": "AnnotationPage",
+                                        "items": [
+                                            {
+                                                "id": "https://iiif.io/api/presentation/4.0/example/uc06/3d/anno/1",
+                                                "type": "Annotation",
+                                                "motivation":  ["painting"],
+                                                "body": {
+                                                    "id": "https://fixtures.iiif.io/3d/thomas_flynn/chess/Pawn_black.glb",
+                                                    "type": "Model",
+                                                    "format": "model/gltf-binary"
+                                                },
+                                                "target": { 
+                                                    "id": "https://iiif.io/api/presentation/4.0/example/uc06/scene/1",
+                                                    "type": "Scene"
+                                                }
+                                            }
+                                        ]
+                                    }
+                                ]
                             },
                             "target": {
                                 "id": "https://iiif.io/api/presentation/4.0/example/uc06/scene/parent/anno/1/specificResource/1",
diff --git a/source/presentation/4.0/example/uc07_duration_composite.json b/source/presentation/4.0/example/uc07_duration_composite.json
index 2e44a2554..81dd2294b 100644
--- a/source/presentation/4.0/example/uc07_duration_composite.json
+++ b/source/presentation/4.0/example/uc07_duration_composite.json
@@ -10,7 +10,7 @@
             "label": { "en": [ "Side A: 99 Luftballons - 10min duration" ] },
             "width": 100,
             "height": 100,
-            "duration": 36000,
+            "duration": 600,
             "items": [
                 {
                     "id": "https://iiif.io/api/presentation/4.0/example/uc07_audio/canvas/1/page/1",