How this works / Signed record

Problem revision

Certified chemical accuracy for systems of a thousand atoms

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
74005c59e6b353f52e00375f37c2a06d8977e60f253354645b7fe8d085a889aa
Content hash
c6c2843da492d6e4265f7b04d8f04c2462b1fc21a622d29ce858d37d03f109ae
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
899
Checkpoint
Size 2,123, being published
Bitcoin date
Block 969,698
Created (claimed)
2026-10-03T07:17:58Z — the Bitcoin date is the one that counts