How this works / Signed record

Problem revision

Why does Mercury have such an outsized iron core?

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
d44c053d7f99ab593381a1200995b357b09aeda9b41417e68946b7e8978a3fe6
Content hash
15d28a791441b0561289b4be4e02e439dfcf8de3676698d1798b5cc4453b93d1
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
1,366
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