thumb|right|Caravela's sandy beach thumb|right|Traditional houses in Caravela Caravela is the northernmost island of the Bissagos Islands of Guinea-Bissau, part of the Sector of Caravela, which also i
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 0x463889729af6720b6e45b92cffdc50d42ac5ceb9b83e5ea0713155510f4bf8ad. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9a6bedd-166e-4b82-8a8c-833c40551f50.json and https://artists.proofprofile.net/proofs/artist/c9a6bedd-166e-4b82-8a8c-833c40551f50.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).