How this works / Signed record

Problem revision

What remains after a black hole evaporates to the Planck scale?

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
a837adbde970e80515b4f1e971e5f83b405eceaf54b4b4dbfd9582e49855d872
Content hash
2ee561486f92d2fa6d1549e11e0260fd427019b7ffc433be810c83060ce9f113
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
1,477
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