How this works / Signed record

Problem revision

How did galaxies accumulate so much dust within one billion years?

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
b4565b3a8c4a5094d849ede3cb44970062457987b929017c3f8f3e04ca701cb0
Content hash
d68edcb13158fcca98798e3928d1015ee30bcf44576822c6d6ea7a4a1dd6c66d
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
569
Checkpoint
Size 2,123, being published
Bitcoin date
Block 969,698
Created (claimed)
2026-10-03T07:17:55Z — the Bitcoin date is the one that counts