diff --git a/hathor/nanocontracts/context.py b/hathor/nanocontracts/context.py
index dc7b0a5a8..7ed05df81 100644
--- a/hathor/nanocontracts/context.py
+++ b/hathor/nanocontracts/context.py
@@ -149,14 +149,6 @@ def get_caller_contract_id(self) -> ContractId | None:
             case _:  # pragma: no cover
                 assert_never(self.caller_id)
 
-    @property
-    def timestamp(self) -> int:
-        """
-        Get the timestamp of the block executing the nano transaction.
-        DEPRECATED: Use `ctx.block.timestamp` instead.
-        """
-        return self.block.timestamp
-
     @property
     def actions(self) -> MappingProxyType[TokenUid, tuple[NCAction, ...]]:
         """Get a mapping of actions per token."""
diff --git a/hathor/nanocontracts/resources/blueprint.py b/hathor/nanocontracts/resources/blueprint.py
index 242f3beab..27da56d61 100644
--- a/hathor/nanocontracts/resources/blueprint.py
+++ b/hathor/nanocontracts/resources/blueprint.py
@@ -23,7 +23,7 @@
 from hathor.nanocontracts import types as nc_types
 from hathor.nanocontracts.blueprint import NC_FIELDS_ATTR
 from hathor.nanocontracts.context import Context
-from hathor.nanocontracts.exception import BlueprintDoesNotExist
+from hathor.nanocontracts.exception import BlueprintDoesNotExist, OCBBlueprintNotConfirmed
 from hathor.nanocontracts.types import blueprint_id_from_bytes
 from hathor.nanocontracts.utils import is_nc_public_method, is_nc_view_method
 from hathor.utils.api import ErrorResponse, QueryParams, Response
@@ -94,6 +94,10 @@ def render_GET(self, request: 'Request') -> bytes:
             request.setResponseCode(404)
             error_response = ErrorResponse(success=False, error=f'Blueprint not found: {params.blueprint_id}')
             return error_response.json_dumpb()
+        except OCBBlueprintNotConfirmed:
+            request.setResponseCode(404)
+            error_response = ErrorResponse(success=False, error=f'Blueprint found but not confirmed: {params.blueprint_id}')
+            return error_response.json_dumpb()
 
         attributes: dict[str, str] = {}
         fields = getattr(blueprint_class, NC_FIELDS_ATTR)
diff --git a/tests/nanocontracts/test_exposed_properties.py b/tests/nanocontracts/test_exposed_properties.py
index 3732fa706..be7930f5b 100644
--- a/tests/nanocontracts/test_exposed_properties.py
+++ b/tests/nanocontracts/test_exposed_properties.py
@@ -37,7 +37,6 @@
     'hathor.nanocontracts.context.Context.get_caller_contract_id',
     'hathor.nanocontracts.context.Context.get_single_action',
     'hathor.nanocontracts.context.Context.some_new_attribute',
-    'hathor.nanocontracts.context.Context.timestamp',
     'hathor.nanocontracts.context.Context.to_json',
     'hathor.nanocontracts.context.Context.vertex',
     'hathor.nanocontracts.exception.NCFail.add_note',