How this works / Signed record

Problem revision

How much lanthanide mass did the GW170817 kilonova eject?

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
7af241df01f5ec50e68c00c400462261edf5a4b32b54cd6c8b34e02526e9c844
Content hash
9831427d0db0245a93c93049747d5b94d788f1f9ce4b1ab0aef43aeebd5ae445
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
594
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