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 0xfa70d4d0894e223a3c10794af9cf3ba02a0e45421531a28ac3e72d57205d7611. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22f9dde7-b55d-4819-8b7b-e3a4cd1a1f2b.json and https://artists.proofprofile.net/proofs/artist/22f9dde7-b55d-4819-8b7b-e3a4cd1a1f2b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Los 12 Hits de Merengues Del Año, Vol. 3