diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..397b4a7
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+*.log
diff --git a/compare.py b/compare.py
new file mode 100755
index 0000000..0fa3b1a
--- /dev/null
+++ b/compare.py
@@ -0,0 +1,98 @@
+#!/usr/bin/env python
+
+import io
+import logging
+import os
+import psycopg2
+
+from swh.model.hashutil import hash_to_hex
+from swh.provenance import get_provenance
+
+
+conninfo1 = {
+    "cls": "ps",
+    "db":
+    {
+        "host": "/var/run/postgresql",
+        "port": "5436",
+        "dbname": "old"
+    }
+}
+conninfo2 = {
+    "cls": "ps",
+    "db":
+    {
+        "host": "/var/run/postgresql",
+        "port": "5436",
+        "dbname": "revisited"
+    }
+}
+
+
+# Print iterations progress
+def printProgressBar(iteration, total, prefix = 'Progress:', suffix = 'Complete', decimals = 1, length = 50, fill = '█', printEnd = "\r"):
+    """
+    Call in a loop to create terminal progress bar
+    @params:
+        iteration   - Required  : current iteration (Int)
+        total       - Required  : total iterations (Int)
+        prefix      - Optional  : prefix string (Str)
+        suffix      - Optional  : suffix string (Str)
+        decimals    - Optional  : positive number of decimals in percent complete (Int)
+        length      - Optional  : character length of bar (Int)
+        fill        - Optional  : bar fill character (Str)
+        printEnd    - Optional  : end character (e.g. "\r", "\r\n") (Str)
+    """
+    percent = ("{0:." + str(decimals) + "f}").format(100 * (iteration / float(total)))
+    filledLength = int(length * iteration // total)
+    bar = fill * filledLength + '-' * (length - filledLength)
+    print(f'\r{prefix} |{bar}| {percent}% {suffix}', end = printEnd)
+    # Print New Line on Complete
+    if iteration == total: 
+        print()
+
+
+if __name__ == "__main__":
+    provenance1 = get_provenance(**conninfo1)
+    provenance2 = get_provenance(**conninfo2)
+
+    provenance1.cursor.execute('''SELECT id FROM content ORDER BY id''')
+    content1 = set(map(lambda row: row[0], provenance1.cursor.fetchall()))
+
+    provenance2.cursor.execute('''SELECT id FROM content ORDER BY id''')
+    content2 = set(map(lambda row: row[0], provenance2.cursor.fetchall()))
+
+    if content1 == content2:
+        total = len(content1)
+        printProgressBar(0, total)
+
+        for i, blob in enumerate(content1):
+            occurrences1 = set(provenance1.content_find_all(blob))
+            occurrences2 = set(provenance2.content_find_all(blob))
+
+            if occurrences1 != occurrences2:
+                with io.open(conninfo1['db']['dbname'] + '.log', 'a') as outfile:
+                    for row in occurrences1:
+                        outfile.write(
+                            "{blob}, {rev}, {date}, {path}\n".format(
+                                blob=hash_to_hex(row[0]),
+                                rev=hash_to_hex(row[1]),
+                                date=row[2],
+                                path=os.fsdecode(row[3]),
+                            )
+                        )
+                with io.open(conninfo2['db']['dbname'] + '.log', 'a') as outfile:
+                    for row in occurrences2:
+                        outfile.write(
+                            "{blob}, {rev}, {date}, {path}\n".format(
+                                blob=hash_to_hex(row[0]),
+                                rev=hash_to_hex(row[1]),
+                                date=row[2],
+                                path=os.fsdecode(row[3]),
+                            )
+                        )
+
+            printProgressBar(i + 1, total)
+
+    else:
+        logging.warning("Content lists are different")