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 0x175b42145793826f7d3a45a3d99a30cbd3e6559c8ad28771ecc06aec88865f7f. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/acf4e56b-16d7-4b7d-bb69-1d5c70f179ad.json and https://artists.proofprofile.net/proofs/artist/acf4e56b-16d7-4b7d-bb69-1d5c70f179ad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).