How this works / Signed record

Problem revision

Does the photon ring of M87* have the shape Kerr predicts?

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
cae4a30791a363a3337c3fca8e9cd036ae539fbcfb924fc196712fb48b835a35
Content hash
9f4b4e1f892799968628e4d1646a18551f2d2a6487a605df62b7947eb46e4e48
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
1,513
Checkpoint
Size 2,123, being published
Bitcoin date
Block 969,698
Created (claimed)
2026-10-03T07:18:04Z — the Bitcoin date is the one that counts