thumb|An IMAX cinema camera, displayed at the National Science and Media Museum, Bradford, England. A movie camera (also known as a motion picture camera, or cine-camera) is a type of photographic cam
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 0x26b735d7b7f4ba728fa40f2d1fcd37f27977d3e7efa7731fb7b66ed1ca5884c8. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b809bd30-7d37-4a43-8752-862a4964d94e.json and https://artists.proofprofile.net/proofs/artist/b809bd30-7d37-4a43-8752-862a4964d94e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).