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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ec076248535727bcfaf64f4a2a1e051c66b915baca19ff304d6be8c45448d1. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a424130-de9b-4b32-a4af-a3beb62d882c.json and https://artists.proofprofile.net/proofs/artist/4a424130-de9b-4b32-a4af-a3beb62d882c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Turkish Rondo from Piano Sonata (K.331) in A Major