1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x75f53251f6d3cd449d61b91424aa7eadf013c46b7ab1a9cad620011152570341. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d1ad49b-5440-4432-8c3b-8111ad05a074.json and https://artists.proofprofile.net/proofs/artist/9d1ad49b-5440-4432-8c3b-8111ad05a074.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vlaha Paei Gia Ti Stani (1953 - 62 Authentic Recordings), Vol. 2
Sti Vrysi Stin Kryovrysi (1936-53 Authentic Recordings), Vol.1