How this works / Signed record

Topic

Do the fundamental constants vary in space or time?

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
0d5d25a5bcd4a09341050ed67516a89341dcb76395d21eb07382fa82d8edaaf2
Content hash
104ff02f93adf521530745ce6f2b989e84f546b689c532620ff80c71a874d69b
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
8
Checkpoint
Size 2,123, being published
Bitcoin date
Block 969,698
Created (claimed)
2026-10-03T07:17:49Z — the Bitcoin date is the one that counts