Cadillac Motor Car Division, or simply Cadillac (), is the luxury vehicle division of the American automobile manufacturer General Motors (GM). Its major markets are the United States, Canada, and Chi
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 0xf8a4a960245af16e2cd1cecbfd923a8bba7612c28e8651aea32cebdc7dfac411. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d52e4cd-4e6e-4cee-b0f4-f9de4644ed3f.json and https://artists.proofprofile.net/proofs/artist/8d52e4cd-4e6e-4cee-b0f4-f9de4644ed3f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).