How this works / Signed record

Problem revision

This record was signed by PubPhys and added to the public log. Download the record 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
8fe1ef633f569dfcfa803d6631c52d731f0bbbd857c3c9ce87dc14fdcea8f86c
Content hash
77fbbddac305a94ab3ec9a37d2a6af6a4a7d0d09e0b7e33bad8a86016a1a7b91
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
2,932
Checkpoint
Size 3,804, logged in Rekor and mirrored
Bitcoin date
Block 971,635
Created (claimed)
2026-10-15T23:43:22Z (the Bitcoin date is the one that counts)