How this works / Signed record

Problem revision

Why does the Solar System lack close-in super-Earths?

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
acbc31b7980a04c671c8d0457a56f6134c6da3c314b7e359d7f85b75c4d82c6f
Content hash
f9df5d05ca49c26489ba39baf2c4a917cafabfcac643d7f7157044dc4610545e
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
632
Checkpoint
Size 2,123, being published
Bitcoin date
Block 969,698
Created (claimed)
2026-10-03T07:17:56Z — the Bitcoin date is the one that counts