Change one line of your own log. Who could tell?

The first button sends only the 64-character fingerprint to the public notary. The second seals the line count, the line number and the two fingerprints as a public result you can show to a board, an auditor or a court.

One timestamp protects the log as it stands today. Sealing each record as it is written protects it for good, and proves nothing was left out.

pip install sebbi        # or: npm install sebbi

import sebbi
sebbi.seal(event, result, "decision")   # one line per record: sealed, numbered, timestamped into Bitcoin