diff --git a/corrlib/integrity.py b/corrlib/integrity.py
index db242f6..bf890db 100644
--- a/corrlib/integrity.py
+++ b/corrlib/integrity.py
@@ -1,32 +1,5 @@
 import datetime as dt
-from pathlib import Path
-from .tools import get_db_file
-import pandas as pd
-import sqlite3
 
 
-def has_valid_times(result: pd.DataFrame) -> bool:
-    # we expect created_at <= updated_at <= now
-    created_at = dt.datetime.fromisoformat(result['created_at'])
-    updated_at = dt.datetime.fromisoformat(result['updated_at'])
-    if created_at > updated_at:
-        return False
-    if updated_at > dt.datetime.now():
-        return False
-    return True
-
-
-def check_db_integrity(path: Path) -> None:
-    db = get_db_file(path)
-    search_expr = "SELECT * FROM 'backlogs'"
-    conn = sqlite3.connect(db)
-    results = pd.read_sql(search_expr, conn)
-
-    for result in results:
-        if not has_valid_times(result):
-            raise ValueError(f"Result with id {result[id]} has wrong time signatures.")
-
-
-def full_integrity_check(path: Path) -> None:
-    check_db_integrity(path)
-
+def check_time_validity(created_at: dt.datetime, updated_at: dt.datetime) -> bool:
+    return not (created_at > updated_at)