alt=Illustration by James Allen St. John for Tarzan and the Golden Lion|thumb|upright=1.1|Illustration by James Allen St. John for Tarzan and the Golden Lion Tarzan (John Clayton, Viscount Greystoke)
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 0xfc0e944f04e87f0eecf7bc880c9582bfcd843b8e74d3c378a4440f0dd4dfd781. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1034c51-e434-40b0-96c3-2b68e40b2cde.json and https://artists.proofprofile.net/proofs/artist/a1034c51-e434-40b0-96c3-2b68e40b2cde.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).