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Problem revision

When did Earth's solid inner core begin to grow?

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
af1bafbfa6747b6262a2e607fd3b79dc32a9c30a8cab8f52e978c43ec6647472
Content hash
00de6aaf928e21ec3c66886a04abb70ee53b0413b9f441a1fce9844da496d2ca
Signed by
c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da
Log entry
1,331
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