thumb|right|350px|The Iberian Peninsula in the 3rd century BC. The Belli, also designated Beli or Belaiscos, were an ancient pre-Roman CelticCremin, The Celts in Europe (1992), p. 57. Celtiberian peop
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 0xf7de4315457c90cd5ea28af2eb8357bfba69e758dff6402bd5d0b3a9d66902f6. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b80f6092-c2f9-4781-9bf0-37f6d517a512.json and https://artists.proofprofile.net/proofs/artist/b80f6092-c2f9-4781-9bf0-37f6d517a512.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).