The Mint 400 is an annual American desert off-road race which takes place near Las Vegas, Nevada. It was resumed in 2008 after a 20-year hiatus. The race was for both motorcycles, until 1977, and fou
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb917e745c2c1b69bc90c153f66c6334cc91a1ac1ad580feb9a4f3760555a95b5. Chain 2 (Bitcoin): anchored in block 954035 (2026-06-17T02:39:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d970e08-46d1-4ae3-9a59-8e8159a21a08.json and https://artists.proofprofile.net/proofs/artist/3d970e08-46d1-4ae3-9a59-8e8159a21a08.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).