thumb|right|220px|Mongo Santamaria, 1969 "Afro Blue" is a jazz standard composed by Mongo Santamaría. Santamaria version Mongo Santamaria recorded his composition "Afro Blue" in 1959 when playing wi
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 0x2eb5d4cdd6b0a623ab887b30d316916b66c5f84c5acbf40132e63f7d13d054b9. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25202b52-b200-461e-8e9f-7c0c9608dad2.json and https://artists.proofprofile.net/proofs/artist/25202b52-b200-461e-8e9f-7c0c9608dad2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
That Is Love: Celebrating 15 Years of Afro Blue