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 0x9ba7d86c5f249b750b7a923666d1b4e23db8f2d99fc50e7d9616daf5f6fd1aef. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1416b2a-c1d4-4be7-96b0-345dda2710f1.json and https://artists.proofprofile.net/proofs/artist/e1416b2a-c1d4-4be7-96b0-345dda2710f1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).