diff -r 08c99d286e7c -r b37fde30dd4a server/src/app/Libraries/CocoonUtils.php
--- a/server/src/app/Libraries/CocoonUtils.php	Thu Feb 11 15:42:27 2016 +0100
+++ b/server/src/app/Libraries/CocoonUtils.php	Fri Feb 12 15:30:32 2016 +0100
@@ -38,7 +38,7 @@
      * @return string
      */
     public static function getIdFromUri($uri) {
-        return substr($uri, strlen(config('corpusparole.cocoon_doc_id_base_uri')));
+        return config('corpusparole.corpus_id_scheme').substr($uri, strlen(config('corpusparole.cocoon_doc_id_base_uri')));
     }
 
     /**
@@ -47,7 +47,7 @@
      * @return string
      */
     public static function getIdFromCorpusUri($uri) {
-        return substr($uri, strlen(config('corpusparole.corpus_doc_id_base_uri')));
+        return config('corpusparole.corpus_id_scheme').substr($uri, strlen(config('corpusparole.corpus_doc_id_base_uri')));
     }
 
     /**
@@ -56,10 +56,16 @@
      * @return string
      */
     public static function getCorpusUriFromId($id) {
+        if(strpos($id, config('corpusparole.corpus_id_scheme')) === 0) {
+            $id = substr($id, strlen(config('corpusparole.corpus_id_scheme')));
+        }
         return rtrim(config('corpusparole.corpus_doc_id_base_uri'),'/')."/$id";
     }
 
     public static function getCocoonPubUrl($id) {
+        if(strpos($id, config('corpusparole.corpus_id_scheme')) === 0) {
+            $id = substr($id, strlen(config('corpusparole.corpus_id_scheme')));
+        }
         return rtrim(config('corpusparole.cocoon_doc_pub_base_uri'), '/')."/$id";
     }