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 0x6f29d4683948643145856d92587cc3a9e6e56e0d55fb703940ded80e87645db1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79229df4-e811-46f1-be13-bd54a3d1f88c.json and https://artists.proofprofile.net/proofs/artist/79229df4-e811-46f1-be13-bd54a3d1f88c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tom Clancy's The Division 2: Warlords of New York (Original Game Soundtrack)