Sean Carl Solomon (born October 24, 1945) is the director of the Lamont–Doherty Earth Observatory of Columbia University, where he is also the William B. Ransford Professor of Earth and Planetary Scie
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098d14363a500ba8fa2b0828229227e6fe0939a320cf7c103f5e3d8774f20348. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4319bdee-24d1-4023-a59d-3f7c85e473aa.json and https://artists.proofprofile.net/proofs/artist/4319bdee-24d1-4023-a59d-3f7c85e473aa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).