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 0x3539170f0f2704b4177393b5d18a864827f8ab78d0929b35dddfecdb67bb92cb. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7aa54216-3ddf-449e-a28f-ec6f06c75e79.json and https://artists.proofprofile.net/proofs/artist/7aa54216-3ddf-449e-a28f-ec6f06c75e79.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Elders Drinking Song 老人飲酒歌 - Original Recording