Donato & Estéfano was a Latin pop duo formed by the collaboration of Donato Poveda of Havana, Cuba, and Fabio Alfonso Salgado ("Estéfano"), a native of Cali, Colombia. Donato y Estefano released three
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 0x6a41b37086516f7d1d767b466dba3a53f1d3e8fdb4aa56bf0d8665af3d22c579. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c50e97a3-ca79-4baa-9ae1-25f01d7712f5.json and https://artists.proofprofile.net/proofs/artist/c50e97a3-ca79-4baa-9ae1-25f01d7712f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).