thumb|right|200px|Hillevi Svedberg thumb|right|200px|Hillevi Engström thumb|right|200px|Hillevi Larsson Hillevi (also Hellevi) is a Scandinavian version of the German name Helvig, originally Heilwig.
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 0xa655fcaf933944372d3b04e0ea21758b316240c4248226383ed3c6064c287f8a. 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/8ea713d6-a426-4360-81d4-013cb811f37f.json and https://artists.proofprofile.net/proofs/artist/8ea713d6-a426-4360-81d4-013cb811f37f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).