How this works / Signed record

Problem revision

Size of the smallest jet drops from bursting bubbles

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
a35f5c755029ecd93ef4123e0565852afd7fa2d5fb705081ea6a74e8a686e8dc
Content hash
e97d17eb6f73403ac4ded0af088505004c2ce91a643a5e148929d7ec561ff4f5
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
1,407
Checkpoint
Size 2,123, being published
Bitcoin date
Block 969,698
Created (claimed)
2026-10-03T07:18:03Z — the Bitcoin date is the one that counts
Download proof (bundle) Record as JSON Keys