right|thumb|300px|An example of a charter (Magna Carta). A charter is the grant of authority or rights, stating that the granter formally recognizes the prerogative of the recipient to exercise the ri
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9946b106f3de92ec1cfa3f7f6c715d2523a2b84e044fdc75df6652a3e13aff84. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d45f1da-8ca1-4359-bd02-090431605f34.json and https://artists.proofprofile.net/proofs/artist/4d45f1da-8ca1-4359-bd02-090431605f34.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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