How this works / Signed record

Problem revision

Static magnetic field vacuum birefringence measured at the QED value

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
018b19b31f5592e1cbe33cf7937648fb1a60ff2720ef5939e7e1165f592ff311
Content hash
97d233951df6d29a8f8f13d6d8561a28913164752d6917e832ebeb8fb108e59d
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
1,879
Checkpoint
Size 2,123, being published
Bitcoin date
Block 969,698
Created (claimed)
2026-10-03T07:18:08Z — the Bitcoin date is the one that counts