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 0xd58b9feb3b1e730de240b3d6fe6e4e0f0fcdbe81ff0661495645b725eac77ff3. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d2652fa-bec5-4630-959b-c5e8f47f1592.json and https://artists.proofprofile.net/proofs/artist/5d2652fa-bec5-4630-959b-c5e8f47f1592.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).