How this works / Signed record

Problem revision

At what energy do extragalactic cosmic rays take over from Galactic ones?

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
a6a796561663976f3ddf558ae535abc711ec941b5c6dd67689033d9388daf318
Content hash
ee8e034284f9ab38bd5a24e6246113b02ba1ead508749a43b10b53ac77d1f638
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
513
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