upright=1.2|thumb|A poster for a American production of Macbeth, starring Thomas W. Keene. Depicted, counter-clockwise from top-left, are: Macbeth and Banquo meeting the witches, the aftermath of the
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 0x2ef211bc3220173a42aaf35d2fb5a2a7692d233f229b96df43f4862d3d12ab00. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0439b73e-efb4-499b-b2de-a1569c181145.json and https://artists.proofprofile.net/proofs/artist/0439b73e-efb4-499b-b2de-a1569c181145.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).