thumb|Lithograph by Josef Kriehuber, 1837 Conradin Kreutzer or Kreuzer (22 November 1780 – 14 December 1849) was a German composer and conductor. His works include the operas Das Nachtlager in Granada
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 0x615ce11f8093fd7914c98d90f7af78418862930d07a29a5b049a5247e8d8ceb9. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b19506c0-80e5-4518-b7ce-1c979a6b6112.json and https://artists.proofprofile.net/proofs/artist/b19506c0-80e5-4518-b7ce-1c979a6b6112.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).