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 0x87dc768ba4d758565800533aa807fdb2f8dc6f0fb8e9d5c37a0809aaa5af2b64. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87e483ae-e78f-401f-991f-4cfae343fa9f.json and https://artists.proofprofile.net/proofs/artist/87e483ae-e78f-401f-991f-4cfae343fa9f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Night Full of Sirens: Anthology '93 -'97