How this works / Signed record

Problem revision

Energy cost of sensing beyond the Berg-Purcell limit

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
40d71d71df51defc22438b6ac7e008f8d479667f6b282c0186e856eebd9f5206
Content hash
872b856f8b154776aec9a4bac48ba72bd7a57c7d41d9751d5bf1a260f122ce09
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
735
Checkpoint
Size 2,123, being published
Bitcoin date
Block 969,698
Created (claimed)
2026-10-03T07:17:57Z — the Bitcoin date is the one that counts