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
- cf94d8ac0e6bb74748b67c032e939f9471057bb16a0036e15147156673ac290a
- Content hash
- 7a85fd3dea9ab3c88030014cc6e3b6bbea515caf55a60dee91ddf72342b33479
- Signed by
- c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
- Log entry
- 1,667
- Checkpoint
- Size 2,123, being published
- Bitcoin date
- Block 969,698
- Created (claimed)
- 2026-10-03T07:18:06Z — the Bitcoin date is the one that counts