How this works / Signed record

Problem revision

Is the neat water surface acidic or basic

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
4e5ddefbc1816b05f8416558a07874f6ed91480a05c9cd70ee5912b3ee81805c
Content hash
14c08636626b81e5b4263269112c8f2f06f5c38ea3a3a3ffe349dcd876d4090d
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
846
Checkpoint
Size 2,123, being published
Bitcoin date
Block 969,698
Created (claimed)
2026-10-03T07:17:58Z — the Bitcoin date is the one that counts