Jack Jeffers (born 17 July 2006) is an American racing driver from San Antonio, Texas. He currently competes in USF Juniors and the USF2000 Championship with Exclusive Autosport. Career Karting
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 0x8c0e1f633d686e21301cacdf5305ac7a41b37a6904847030ca378041df241675. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4b54562-54bd-4261-9358-0562ab0e4322.json and https://artists.proofprofile.net/proofs/artist/b4b54562-54bd-4261-9358-0562ab0e4322.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).