thumb|Triangle, a polygon with three corners (vertices) and three lines (sides) A triangle is a polygon with three corners and three sides, one of the basic shapes in geometry. The corners, also calle
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 0xd0bbe1c8592cf764e215defc233aef190b4fe3023cf4e2bb9e22924ecd42070f. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c2165d1-9bf4-4c3c-a6f0-65f923dfc218.json and https://artists.proofprofile.net/proofs/artist/0c2165d1-9bf4-4c3c-a6f0-65f923dfc218.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).