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 0x4c8840b4614561ac8c0c7ae25793246f4fc3f3a96a8e68cbc035354e534e69a4. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1107d32a-13be-4d2b-91a0-7ad3c07a9085.json and https://artists.proofprofile.net/proofs/artist/1107d32a-13be-4d2b-91a0-7ad3c07a9085.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).