How this works / Signed record

Problem revision

Why narrow beams spare tissue that wide beams destroy

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
9710883231808fb035901e87eb783229c6e80a0cb54ce00f9d69cf59cd3f1b97
Content hash
f326c7771aa53b064d9404ad69b42a4d769bb29457ed5395a3cb05cfe10e2e4e
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
1,726
Checkpoint
Size 2,123, being published
Bitcoin date
Block 969,698
Created (claimed)
2026-10-03T07:18:07Z — the Bitcoin date is the one that counts