Fidel Nadal (; born Fidel Ernesto Nadal on October 4, 1965) is an Afro-Argentinian Reggae musician, songwriter and pioneer of Argentine Reggae and the underground punk/hardcore movement of Argentina.
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 0x7671bc59acfd6cd794e0c34861336b31a0b9c941b201777e39f20aa159fd9ee2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11f0cbf0-905c-4e59-ac25-a0c99a87ca4a.json and https://artists.proofprofile.net/proofs/artist/11f0cbf0-905c-4e59-ac25-a0c99a87ca4a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).