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 0xb156070e3e11643b5fb3dbe8e1c30427ce83e0d7de51a21916ab7b885ff15f54. 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/4e80a7dc-9b4d-4f09-bbfd-c536626f052b.json and https://artists.proofprofile.net/proofs/artist/4e80a7dc-9b4d-4f09-bbfd-c536626f052b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Plays Vivaldi: The Four Seasons-Summer In G Minor, RV.315: III.Presto (Violin)
Plays Brahms: Hungarian Dance Nº 5 In G Minor. Allegro (Violin & Piano)
Plays Mozart: Piano Concerto Nº 21 in C Major, K. 467: II. Andante (Violin & Piano)