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 0x5cef9dfb0eb846567e90bfc3c13a1514950c6569101a0be10a164919b22bb95f. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c33c590-6f1b-415a-963d-c01458ad9d02.json and https://artists.proofprofile.net/proofs/artist/4c33c590-6f1b-415a-963d-c01458ad9d02.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
L'amant del silenci (Original Motion Picture Soundtrack)
Pequeña Silenciosa (Original Motion Picture Soundtrack)
Blue Rai (Original Motion Picture Soundtrack)
Capa Negra (Banda sonora original de la pel·lícula)
Verano Rojo (Original Motion Picture Soundtrack)
Con la boca cerrada (Original Motion Picture Soundtrack)
What is love (Original motion picture soundtrack)
Tu último día en la tierra (Original Motion Picture Soundtrack)
Quién Eres (Original Motion Picture Soundtrack)
Half The Story (Original Documentary Soundtrack)
Dana (Original Motion Picture Soundtrack)
Y todos arderán (Original Motion Picture Soundtrack)