diff --git a/cas_wrapper.py b/cas_wrapper.py
index 301e07e..512a923 100644
--- a/cas_wrapper.py
+++ b/cas_wrapper.py
@@ -122,8 +122,7 @@ class CasWrapper:
         self.ensure_login()
         try:
             result_json = self.authenticate(local_path, return_json=True)
-            # it should return 0 for authenticated and trusted commits
-            is_authenticated = not bool(result_json['status'])
+            is_authenticated = result_json['verified']
             commit_cas_hash = result_json['hash']
         # we can fall with ProcessExecutionError,
         # because source can be not notarized
@@ -135,7 +134,6 @@ class CasWrapper:
         self,
         local_path: str,
         use_hash: bool = False,
-        return_json: bool = False,
     ) -> bool:
         """
         Authenticates artifact by artifact path or hash if `use_hash` is True.
@@ -147,10 +145,10 @@ class CasWrapper:
             is_authenticated = self.authenticate(
                 local_path,
                 use_hash=use_hash,
-                return_json=return_json,
-            )
+                return_json=True,
+            )['verified']
         # we can fall with ProcessExecutionError,
-        # because source can be not notarized
+        # because artifact can be not notarized
         except ProcessExecutionError:
             self._logger.exception('Cannot authenticate: %s', local_path)
         return is_authenticated