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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65852488c13d1ae2d9a5b3ecc4fcecf4d35752d2a1aafc695647ce93049cf98. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1b43d66-c3ad-46e5-98ac-d8595f2214d3.json and https://artists.proofprofile.net/proofs/artist/b1b43d66-c3ad-46e5-98ac-d8595f2214d3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).