300px|thumb|Prototype Mercedes-Benz 300SL, developed at Hoffman's request for the U.S. marketplace 300px|thumb|Porsche 356 Speedster, another model suggested by Hoffman 300px|thumb|BMW 507, designed a
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 0xb9b9e62bdcfd0dd518e097b3d7eb4ad9ace0c4f9527d1ff3fa9e278dbd8ce5b6. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9780da26-1253-4d2c-a47f-b58d280af7f9.json and https://artists.proofprofile.net/proofs/artist/9780da26-1253-4d2c-a47f-b58d280af7f9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).