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 0xb3553d99ddc83e080a0762f69fa2df7897f0511706eaaa0fcdb7a1f29e7d8257. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4fdc4ed-e0a9-4657-9fd9-b7c8df4885f9.json and https://artists.proofprofile.net/proofs/artist/a4fdc4ed-e0a9-4657-9fd9-b7c8df4885f9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).