diff --git a/scipost/services.py b/scipost/services.py
index 7fe098f6febac818824fee0f85333d86ba2b5e64..a0388e017c2a2efc2ee15a064337f654d8bd3a9c 100644
--- a/scipost/services.py
+++ b/scipost/services.py
@@ -257,7 +257,7 @@ class OSFPreprintsCaller:
             identifier=self.identifier,
             url=url,
         ))
-        if self._result_present(response_content['data']):
+        if self._result_present(response_content):
             self.is_valid = True
             self._osfpreprints_data = response_content['data']
             self.metadata = response_content['data']
@@ -267,7 +267,7 @@ class OSFPreprintsCaller:
         osfpreprints_logger.info('GET [{identifier}] [response {valid}] | {response}'.format(
             identifier=self.identifier,
             valid='VALID' if self.is_valid else 'INVALID',
-            response=response_content['data'],
+            response=response_content,
         ))
 
     def _format_data(self):
@@ -292,7 +292,9 @@ class OSFPreprintsCaller:
             'identifier_w_vn_nr': identifier_w_vn_nr
         }
 
-    def _result_present(self, data):
-        if 'id' in data and data['id'] == self.identifier:
+    def _result_present(self, response_content):
+        if ('data' in response_content and
+            'id' in response_content['data'] and
+            response_content['data']['id'] == self.identifier):
             return True
         return False
diff --git a/submissions/forms.py b/submissions/forms.py
index 71d976586eeaf52cb8975814342a46d38e5d5c01..65bbfb1b6e2c5268e454d77e2c0c46fc6255bc6e 100644
--- a/submissions/forms.py
+++ b/submissions/forms.py
@@ -52,10 +52,8 @@ import strings
 import iThenticate
 
 ARXIV_IDENTIFIER_PATTERN_NEW = r'^[0-9]{4,}\.[0-9]{4,5}v[0-9]{1,2}$'
-CHEMRXIV_DOI_PATTERN = r'https://doi.org/10.26434/chemrxiv.[0-9]+.v[0-9]{1,2}$'
-CHEMRXIV_IDENTIFIER_PATTERN = r'^[0-9]+\.v[0-9]{1,2}$'
 FIGSHARE_IDENTIFIER_PATTERN = r'^[0-9]+\.v[0-9]{1,2}$'
-OSFPREPRINTS_IDENTIFIER_PATTERN = r'[a-z0-9]+$'
+OSFPREPRINTS_IDENTIFIER_PATTERN = r'^[a-z0-9]+$'
 
 
 class SubmissionSearchForm(forms.Form):