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
59bd3a0d2a5055cc5a5ff76d31a3f8833c7d30a46d0602fbf9804b371a783271
Content hash
8ef34f1b0b02d3c9c10a73aef3ffbc3f64f6d5780cbc7b01fe09536cbc3b61b3
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
2,602
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)