thumb|alt=An EMV credit card|right|220x220px|An EMV credit card EMV is a payment method based on a technical standard for smart payment cards and for payment terminals and automated teller machines w
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 0x447438c083cfeef5a4c2527fc6aad418d9ee808d2853f2380a4e2cec88ffd074. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3bb57b7-4c2f-4a45-b67a-83514c6506e1.json and https://artists.proofprofile.net/proofs/artist/f3bb57b7-4c2f-4a45-b67a-83514c6506e1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).