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
5acb20d6af92c2b2aa0bfe9aec2e08f7a961d8ce7c0e480b9ac3c259e9334bde
Content hash
c5a8b2e46af9f6c4e3a1d4dcf5eb24985f073d8302d7cb0da5979453d1f23d25
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
3,140
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)