diff -r 7b2dcd2b31c1 -r 74fba571487e server/src/app/Libraries/CocoonUtils.php
--- a/server/src/app/Libraries/CocoonUtils.php	Mon Feb 06 16:05:02 2017 +0100
+++ b/server/src/app/Libraries/CocoonUtils.php	Wed Feb 08 15:25:24 2017 +0100
@@ -33,7 +33,7 @@
     ];
 
     /**
-     * Extract id form cocoon url.
+     * Extract id from cocoon url.
      *
      * @return string
      */
@@ -42,6 +42,15 @@
     }
 
     /**
+     * Extract Cocoon id from Cocoon url.
+     *
+     * @return string
+     */
+    public static function getCocoonIdFromCorpusUri($uri) {
+        return substr($uri, strlen(config('corpusparole.cocoon_doc_id_base_uri')));
+    }
+
+    /**
      * Extract id form corpus url.
      *
      * @return string