How this works / Signed record

Problem revision

Extrapolating dynamic aperture from a million to a billion turns

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
7c76a666c47331c2654443388577edd6af3e7ba9731421380c24cf9ee050572a
Content hash
097f36aa7941ef38536ba48278c5efe29c0e39a80f4e4917de14f85afb45dc82
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
681
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