How this works / Signed record
Problem revision
This record was signed by PubPhys and added to the public log. Download the proof and check it with the open verifier: it recomputes every fingerprint, checks the PubPhys signature against the published key, finds the entry in the log and checks the Bitcoin date, without relying on this site.
- Record hash
- f9d5e291404e38224e1f97e59c4f73181555482ecbd088d175d956512c9c9ffc
- Content hash
- 90814458d82691792dfdfb4c0df403916c28b1d3e05e54d39228e5b2a1689515
- Signed by
- c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
- Log entry
- 451
- Checkpoint
- Size 2,123, being published
- Bitcoin date
- Block 969,698
- Created (claimed)
- 2026-10-03T07:17:54Z — the Bitcoin date is the one that counts