Miguel ArribasMunicipio de Ponce: Alcaldes en su Historia. Puerto Rico Encyclopedia. Fundación Puertorriqueña para las Humanidades. 2018. Accessed 2 May 2018. Retrieved 9 July 2009. (ca. 1811 – ca.
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 0x46dcc4e8b15159c76ae12bb94db2ec2690a2aaeea47b543fc4e362a9fddbb5fe. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f2dda45-be85-46dc-9e8f-66d112a153d1.json and https://artists.proofprofile.net/proofs/artist/4f2dda45-be85-46dc-9e8f-66d112a153d1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).