How this works / Signed record

Problem revision

Atom-interferometric test of universality of free fall at 1e-15

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
1e7fc526b360e7a2a266805dd04cd294adce9d1561b67a65f94412af76c7f0a4
Content hash
136d8d18eef0076ab9fe80a6bc05a309440f346e78537551b5096f2ed17c8eb8
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
448
Checkpoint
Size 2,123, being published
Bitcoin date
Block 969,698
Created (claimed)
2026-10-03T07:17:54Z — the Bitcoin date is the one that counts