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 0xdd8f7392c7ad112b0b02c7122ede1cdf0041d3cc9b46a0f955cb33e0d417d078. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac22ac94-d059-4f10-a6b1-a804a41c7557.json and https://artists.proofprofile.net/proofs/artist/ac22ac94-d059-4f10-a6b1-a804a41c7557.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).