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 0xc580d7351c69021cfb11836fd144534c51d41101e1e19e3db517d6f6ecd1c1a3. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f4ca0be-9423-4d96-8f43-be13c0fe29b1.json and https://artists.proofprofile.net/proofs/artist/8f4ca0be-9423-4d96-8f43-be13c0fe29b1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Colección De Oro: Tres Ritmos De Época, Vol. 1 – El Bodeguero