thumb|An Eiki EX-4000P movie projector with a filmlooper designed by Studio 2M (Formerly ) is a Japanese company that manufactures LCD and DLP projectors, related accessories and overhead projectors
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03679385c8928d0a85f2b9d002f1cfa61e715303c0d52b956948f3cfdffb6c10. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17d4e37f-ba9e-4ca5-b22e-5a94e31bbe36.json and https://artists.proofprofile.net/proofs/artist/17d4e37f-ba9e-4ca5-b22e-5a94e31bbe36.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).