thumb|Galen Clark in the Big Tree Grove, photo by Carleton E. Watkins, c. 1865-66 Galen Clark (March 28, 1814 – March 24, 1910) was a Canadian-born American conservationist and writer. He is known as
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 0x8c0a23835725b9cdac972b055d0954456f4a3c49126a6322c1a964825766412d. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dba1a6bd-f7ec-41f4-be3e-2f73bd33afd7.json and https://artists.proofprofile.net/proofs/artist/dba1a6bd-f7ec-41f4-be3e-2f73bd33afd7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).