How this works / Signed record

Problem revision

Maximum number of mutually unbiased bases in composite dimensions

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
f40998596bac10f98640f4ea60b24897b7408f7ec3baa5aaeaece28c93fa5538
Content hash
f97887b7b76832c6eb35d6eb33b7eec6f2d6d083f72623245e0132026df534fe
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
2,053
Checkpoint
Size 2,123, being published
Bitcoin date
Block 969,698
Created (claimed)
2026-10-03T07:18:10Z — the Bitcoin date is the one that counts