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 0x16c03f312aba274cb6ee19131b6610bea759fb0c4f0d507de80030a457b8694b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8dfe1e6a-9bb7-4e9e-b0d7-d26573f080a2.json and https://artists.proofprofile.net/proofs/artist/8dfe1e6a-9bb7-4e9e-b0d7-d26573f080a2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).