Arturo Tamayo Ballesteros (born 3 August 1946) is a Spanish conductor and music teacher. Life Tamayo studied music at the Real Conservatorio Superior de Música de Madrid, while studying Law at the
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438fa4d597fbea8b5e784d539a9c4fd175f7e3550363b1dbff71580d8f8bea11. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e0f89cb-1d06-4380-adac-b6a97631f81e.json and https://artists.proofprofile.net/proofs/artist/9e0f89cb-1d06-4380-adac-b6a97631f81e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Huber, K.: Tenebrae / Chamber Concerto, "Intarsi" / Protuberanzen / James Joyce Chamber Music
Busoni, F.: Orchestral, Chamber and Piano Music
Ohana, M.: Miroir De Celestine / 2 Pieces / So Tango / Sacral D'Ilx / Carillons / Sarabande