How this works / Signed record

Problem revision

Is an earthquake's final magnitude determined in its first seconds?

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
713e44184e45af8a00840416735eaf6c6221356f938cb472d3a40811896e2508
Content hash
92f5845e5cf3cd1fb4c0714d345e1e811ddce8a207e648649fd7e813d6ded707
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
1,310
Checkpoint
Size 2,123, being published
Bitcoin date
Block 969,698
Created (claimed)
2026-10-03T07:18:02Z — the Bitcoin date is the one that counts