How this works / Signed record

Problem revision

Does a two-dimensional metal survive to zero temperature?

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
4c448b7ed23186f229a5cb04de37d8c80845202fd81850e151464854e4ad8afc
Content hash
61d8a355b93389300cd33f36cd8d26310f1c2efeed2c11b16d2acfe1baa089ff
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
1,094
Checkpoint
Size 2,123, being published
Bitcoin date
Block 969,698
Created (claimed)
2026-10-03T07:18:00Z — the Bitcoin date is the one that counts