How this works / Signed record

Problem revision

Did Venus ever have surface oceans?

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
d848dac570f00c18b6ff4df2c27348d655af6874bf9aa1ac57b7e826ef8febf7
Content hash
bcce45d84e228d21cea501e8754c601320758652826a361faebd2098507ba9c2
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
1,383
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