How this works / Signed record

Problem revision

Minimal dissipation for a given error rate and speed

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
64c1f8a76a5e27d6d1fe017eadac80d4f8027f4a2123e18277a9be54cdb1869b
Content hash
d250a9bc2e1a23ace00d6ff0abc2d22dae312255162adf4de711cdfa436ed64f
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
715
Checkpoint
Size 2,123, being published
Bitcoin date
Block 969,698
Created (claimed)
2026-10-03T07:17:56Z — the Bitcoin date is the one that counts