diff --git a/lib/Alchemy/Phrasea/Controller/Api/InstanceIdAware.php b/lib/Alchemy/Phrasea/Controller/Api/InstanceIdAware.php
new file mode 100644
index 0000000000..6d93a27921
--- /dev/null
+++ b/lib/Alchemy/Phrasea/Controller/Api/InstanceIdAware.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace Alchemy\Phrasea\Controller\Api;
+
+use Alchemy\Phrasea\Core\Configuration\PropertyAccess;
+
+trait InstanceIdAware
+{
+    private $instanceId;
+
+    /**
+     * @param PropertyAccess $conf
+     * @return InstanceIdAware
+     */
+    public function setInstanceId(PropertyAccess $conf)
+    {
+        $this->instanceId = $conf->get(
+            ['main', 'instance_id'],
+            md5($conf->get(['main', 'key'], ''))
+        );
+
+        return $this;
+    }
+
+    public function getResourceIdResolver()
+    {
+        return function(\record_adapter $record): string {
+            return $this->instanceId . '_' . $record->getDataboxId() . '_' . $record->getRecordId();
+        };
+    }
+}
diff --git a/lib/Alchemy/Phrasea/Controller/Api/V1Controller.php b/lib/Alchemy/Phrasea/Controller/Api/V1Controller.php
index 4b2737e01d..728cb743a3 100644
--- a/lib/Alchemy/Phrasea/Controller/Api/V1Controller.php
+++ b/lib/Alchemy/Phrasea/Controller/Api/V1Controller.php
@@ -113,6 +113,7 @@ class V1Controller extends Controller
     use DispatcherAware;
     use FilesystemAware;
     use JsonBodyAware;
+    use InstanceIdAware;
 
     const OBJECT_TYPE_USER = 'http://api.phraseanet.com/api/objects/user';
     const OBJECT_TYPE_STORY = 'http://api.phraseanet.com/api/objects/story';
@@ -1216,7 +1217,7 @@ public function searchAction(Request $request)
     {
         $subdefTransformer = new SubdefTransformer($this->app['acl'], $this->getAuthenticatedUser(), new PermalinkTransformer());
         $technicalDataTransformer = new TechnicalDataTransformer();
-        $recordTransformer = new RecordTransformer($subdefTransformer, $technicalDataTransformer);
+        $recordTransformer = new RecordTransformer($subdefTransformer, $technicalDataTransformer, $this->getResourceIdResolver());
         $storyTransformer = new StoryTransformer($subdefTransformer, $recordTransformer);
         $compositeTransformer = new V1SearchCompositeResultTransformer($recordTransformer, $storyTransformer);
         $searchTransformer = new V1SearchResultTransformer($compositeTransformer);
@@ -1275,7 +1276,7 @@ public function searchRecordsAction(Request $request)
     {
         $subdefTransformer = new SubdefTransformer($this->app['acl'], $this->getAuthenticatedUser(), new PermalinkTransformer());
         $technicalDataTransformer = new TechnicalDataTransformer();
-        $recordTransformer = new RecordTransformer($subdefTransformer, $technicalDataTransformer);
+        $recordTransformer = new RecordTransformer($subdefTransformer, $technicalDataTransformer, $this->getResourceIdResolver());
         $searchTransformer = new V1SearchRecordsResultTransformer($recordTransformer);
 
         $transformerResolver = new SearchResultTransformerResolver([
@@ -1667,6 +1668,7 @@ private function listRecord(Request $request, record_adapter $record)
         $data = [
             'databox_id'             => $record->getDataboxId(),
             'record_id'              => $record->getRecordId(),
+            'resource_id'            => ($this->getResourceIdResolver())($record),
             'mime_type'              => $record->getMimeType(),
             'title'                  => $record->get_title(['encode'=> record_adapter::ENCODE_NONE]),
             'original_name'          => $record->get_original_name(),
@@ -1721,17 +1723,18 @@ private function listStory(Request $request, record_adapter $story)
         };
 
         return [
-            '@entity@'      => self::OBJECT_TYPE_STORY,
-            'databox_id'    => $story->getDataboxId(),
-            'story_id'      => $story->getRecordId(),
+            '@entity@'        => self::OBJECT_TYPE_STORY,
+            'databox_id'      => $story->getDataboxId(),
+            'story_id'        => $story->getRecordId(),
+            'resource_id'     => ($this->getResourceIdResolver())($story),
             'cover_record_id' => $story->getCoverRecordId(),
-            'updated_on'    => $story->getUpdated()->format(DATE_ATOM),
-            'created_on'    => $story->getCreated()->format(DATE_ATOM),
-            'collection_id' => $story->getCollectionId(),
-            'base_id'       => $story->getBaseId(),
-            'thumbnail'     => $this->listEmbeddableMedia($request, $story, $story->get_thumbnail()),
-            'uuid'          => $story->getUuid(),
-            'metadatas'     => [
+            'updated_on'      => $story->getUpdated()->format(DATE_ATOM),
+            'created_on'      => $story->getCreated()->format(DATE_ATOM),
+            'collection_id'   => $story->getCollectionId(),
+            'base_id'         => $story->getBaseId(),
+            'thumbnail'       => $this->listEmbeddableMedia($request, $story, $story->get_thumbnail()),
+            'uuid'            => $story->getUuid(),
+            'metadatas'       => [
                 '@entity@'       => self::OBJECT_TYPE_STORY_METADATA_BAG,
                 'dc:contributor' => $format($caption, \databox_Field_DCESAbstract::Contributor),
                 'dc:coverage'    => $format($caption, \databox_Field_DCESAbstract::Coverage),
@@ -1749,7 +1752,7 @@ private function listStory(Request $request, record_adapter $story)
                 'dc:title'       => $format($caption, \databox_Field_DCESAbstract::Title),
                 'dc:type'        => $format($caption, \databox_Field_DCESAbstract::Type),
             ],
-            'records'       => $this->listRecords($request, array_values($story->getChildren()->get_elements())),
+            'records'         => $this->listRecords($request, array_values($story->getChildren()->get_elements())),
         ];
     }
 
diff --git a/lib/Alchemy/Phrasea/Controller/Api/V3/V3ResultHelpers.php b/lib/Alchemy/Phrasea/Controller/Api/V3/V3ResultHelpers.php
index 1a4849fc22..f2cc28e482 100644
--- a/lib/Alchemy/Phrasea/Controller/Api/V3/V3ResultHelpers.php
+++ b/lib/Alchemy/Phrasea/Controller/Api/V3/V3ResultHelpers.php
@@ -5,6 +5,7 @@
 
 use ACL;
 use Alchemy\Phrasea\Authentication\Authenticator;
+use Alchemy\Phrasea\Controller\Api\InstanceIdAware;
 use Alchemy\Phrasea\Core\Configuration\PropertyAccess;
 use Alchemy\Phrasea\Media\MediaSubDefinitionUrlGenerator;
 use databox_status;
@@ -17,6 +18,8 @@
 
 class V3ResultHelpers
 {
+    use InstanceIdAware;
+
     /** @var PropertyAccess */
     private $conf;
 
@@ -151,6 +154,7 @@ public function listRecord(Request $request, record_adapter $record, ACL $aclfor
         $data = [
             'databox_id'             => $record->getDataboxId(),
             'record_id'              => $record->getRecordId(),
+            'resource_id'            => ($this->getResourceIdResolver())($record),
             'mime_type'              => $record->getMimeType(),
             'title'                  => $record->get_title(['encode'=> record_adapter::ENCODE_NONE]),
             'original_name'          => $record->get_original_name(),
diff --git a/lib/Alchemy/Phrasea/Controller/Api/V3/V3SearchController.php b/lib/Alchemy/Phrasea/Controller/Api/V3/V3SearchController.php
index c16b13fa82..6cfd6bd682 100644
--- a/lib/Alchemy/Phrasea/Controller/Api/V3/V3SearchController.php
+++ b/lib/Alchemy/Phrasea/Controller/Api/V3/V3SearchController.php
@@ -5,6 +5,7 @@
 use Alchemy\Phrasea\Application\Helper\DispatcherAware;
 use Alchemy\Phrasea\Application\Helper\JsonBodyAware;
 use Alchemy\Phrasea\Collection\Reference\CollectionReference;
+use Alchemy\Phrasea\Controller\Api\InstanceIdAware;
 use Alchemy\Phrasea\Controller\Api\Result;
 use Alchemy\Phrasea\Controller\Controller;
 use Alchemy\Phrasea\Databox\DataboxGroupable;
@@ -51,6 +52,7 @@ class V3SearchController extends Controller
 {
     use JsonBodyAware;
     use DispatcherAware;
+    use InstanceIdAware;
 
     /**
      * Search for results
@@ -65,7 +67,7 @@ public function searchAction(Request $request)
 
         $subdefTransformer = new SubdefTransformer($this->app['acl'], $this->getAuthenticatedUser(), new PermalinkTransformer());
         $technicalDataTransformer = new TechnicalDataTransformer();
-        $recordTransformer = new RecordTransformer($subdefTransformer, $technicalDataTransformer);
+        $recordTransformer = new RecordTransformer($subdefTransformer, $technicalDataTransformer, $this->getResourceIdResolver());
         $storyTransformer = new V3StoryTransformer($recordTransformer);
         $compositeTransformer = new V3SearchCompositeResultTransformer($recordTransformer, $storyTransformer);
         $searchTransformer = new V3SearchResultTransformer($compositeTransformer);
diff --git a/lib/Alchemy/Phrasea/ControllerProvider/Api/V1.php b/lib/Alchemy/Phrasea/ControllerProvider/Api/V1.php
index bdc7a8cd50..a7cc39aa8e 100644
--- a/lib/Alchemy/Phrasea/ControllerProvider/Api/V1.php
+++ b/lib/Alchemy/Phrasea/ControllerProvider/Api/V1.php
@@ -38,7 +38,9 @@ public function register(Application $app)
                 ->setDataboxLoggerLocator($app['phraseanet.logger'])
                 ->setDispatcher($app['dispatcher'])
                 ->setFileSystemLocator(new LazyLocator($app, 'filesystem'))
-                ->setJsonBodyHelper(new LazyLocator($app, 'json.body_helper'));
+                ->setJsonBodyHelper(new LazyLocator($app, 'json.body_helper'))
+                ->setInstanceId($app['conf'])
+                ;
         });
     }
 
@@ -186,6 +188,7 @@ public function connect(Application $app)
             ->assert('databox_id', '\d+')
             ->assert('record_id', '\d+');
 
+        /** @uses \Alchemy\Phrasea\Controller\Api\V1Controller::getRecordAction */
         $controllers->get('/records/{databox_id}/{record_id}/', 'controller.api.v1:getRecordAction')
             ->before('controller.api.v1:ensureCanAccessToRecord')
             ->assert('databox_id', '\d+')
@@ -238,6 +241,7 @@ public function connect(Application $app)
             ->assert('record_id', '\d+');
         $controllers->get('/stories/{any_id}/{anyother_id}/embed/', 'controller.api.v1:getBadRequestAction');
 
+        /** @uses \Alchemy\Phrasea\Controller\Api\V1Controller::getStoryAction */
         $controllers->get('/stories/{databox_id}/{record_id}/', 'controller.api.v1:getStoryAction')
             ->before('controller.api.v1:ensureCanAccessToRecord')
             ->assert('databox_id', '\d+')
diff --git a/lib/Alchemy/Phrasea/ControllerProvider/Api/V3.php b/lib/Alchemy/Phrasea/ControllerProvider/Api/V3.php
index e7797eaf92..dafff86a2f 100644
--- a/lib/Alchemy/Phrasea/ControllerProvider/Api/V3.php
+++ b/lib/Alchemy/Phrasea/ControllerProvider/Api/V3.php
@@ -30,8 +30,8 @@ public function register(Application $app)
                 $app['conf'],
                 $app['media_accessor.subdef_url_generator'],
                 $app['authentication'],
-                $app['url_generator']
-            ));
+                $app['url_generator']))
+                ->setInstanceId($app['conf']);
         });
         $app['controller.api.v3.subdefs_service'] = $app->share(function (PhraseaApplication $app) {
             return (new V3SubdefsServiceController($app))
@@ -46,7 +46,9 @@ public function register(Application $app)
                 ;
         });
         $app['controller.api.v3.search'] = $app->share(function (PhraseaApplication $app) {
-            return (new V3SearchController($app));
+            return (new V3SearchController($app))
+                ->setInstanceId($app['conf'])
+                ;
         });
         $app['controller.api.v3.searchraw'] = $app->share(function (PhraseaApplication $app) {
             return (new V3SearchRawController($app));
diff --git a/lib/Alchemy/Phrasea/Search/RecordTransformer.php b/lib/Alchemy/Phrasea/Search/RecordTransformer.php
index 7dd6cd5a5e..9f6a715e93 100644
--- a/lib/Alchemy/Phrasea/Search/RecordTransformer.php
+++ b/lib/Alchemy/Phrasea/Search/RecordTransformer.php
@@ -41,10 +41,16 @@ class RecordTransformer extends TransformerAbstract
      */
     private $technicalDataTransformer;
 
-    public function __construct(SubdefTransformer $subdefTransformer, TechnicalDataTransformer $technicalDataTransformer)
+    /**
+     * @var callable
+     */
+    private $resourceIdResolver;
+
+    public function __construct(SubdefTransformer $subdefTransformer, TechnicalDataTransformer $technicalDataTransformer, callable $resourceIdResolver)
     {
         $this->subdefTransformer = $subdefTransformer;
         $this->technicalDataTransformer = $technicalDataTransformer;
+        $this->resourceIdResolver = $resourceIdResolver;
     }
 
     public function transform($recordView)
@@ -55,6 +61,7 @@ public function transform($recordView)
         return [
             'databox_id' => $record->getDataboxId(),
             'record_id' => $record->getRecordId(),
+            'resource_id' => ($this->resourceIdResolver)($record),
             'mime_type' => $record->getMimeType(),
             'title' => $record->get_title(['encode'=> record_adapter::ENCODE_NONE]),
             'original_name' => $record->get_original_name(),
@@ -160,4 +167,12 @@ public function includeCaption(RecordView $recordView)
             ];
         });
     }
+
+    /**
+     * @return callable
+     */
+    public function getResourceIdResolver(): callable
+    {
+        return $this->resourceIdResolver;
+    }
 }
diff --git a/lib/Alchemy/Phrasea/Search/StoryTransformer.php b/lib/Alchemy/Phrasea/Search/StoryTransformer.php
index 17f67f0e64..4fb17274b6 100644
--- a/lib/Alchemy/Phrasea/Search/StoryTransformer.php
+++ b/lib/Alchemy/Phrasea/Search/StoryTransformer.php
@@ -53,6 +53,7 @@ public function transform(StoryView $storyView)
             '@entity@' => 'http://api.phraseanet.com/api/objects/story',
             'databox_id' => $story->getDataboxId(),
             'story_id' => $story->getRecordId(),
+            'resource_id' => ($this->recordTransformer->getResourceIdResolver())($story),
             'cover_record_id' => $story->getCoverRecordId(),
             'updated_on' => NullableDateTime::format($story->getUpdated()),
             'created_on' => NullableDateTime::format($story->getUpdated()),