Clark is an English language surname with historical links to England, Scotland, and Ireland,Clarke coat of arms, family crest and family history". irishsurnames.com. Retrieved 30 December 2007. ultim
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 0x771efa706d6518daacbd18552255ceb81c5000f7c1ccdb1cfeba0fe790237d6a. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90d54e5b-2a1f-4fd6-8827-b1cb824ccc5f.json and https://artists.proofprofile.net/proofs/artist/90d54e5b-2a1f-4fd6-8827-b1cb824ccc5f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).