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 0xae30cb70acfaf3af945468e81605a1e60f48d849d0f48e8f14857162bb62c050. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0861615d-7949-4908-bf07-bb9b233c748f.json and https://artists.proofprofile.net/proofs/artist/0861615d-7949-4908-bf07-bb9b233c748f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cuarteto Caney (1939-1940) - The Originals Series
Cuarteto Caney (1939-1940) Featuring Machito
Puerto Rican Pop Music (1935 - 1940), Vol. 1
Beyond Patina Jazz Masters: Cuarteto Caney
Pare Cochero! - Cuarteto Caney Cuban Classics