How this works / Signed record

Problem revision

What supplies the heat that keeps Enceladus's ocean liquid?

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
a2380fde60180a91bd7472241c89b579a67c25a286226aa9ff23234d743add58
Content hash
756fd45a628ab671c6e2836339847c023e5a2a66b20940e55206c29fae851802
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
1,342
Checkpoint
Size 2,123, being published
Bitcoin date
Block 969,698
Created (claimed)
2026-10-03T07:18:03Z — the Bitcoin date is the one that counts