How this works / Signed record

Problem revision

Exact classical double copy for generic vacuum spacetimes

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
77c413dd5f838a071f93b8c502f3b339d088cee4b0bcdf5b7f223986901bcbc8
Content hash
09dc1cf6feaa0ddc6b675d68427416d8f782fe7b814e09814ad878e4d1b208e3
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
1,905
Checkpoint
Size 2,123, being published
Bitcoin date
Block 969,698
Created (claimed)
2026-10-03T07:18:09Z — the Bitcoin date is the one that counts