Matt Caughthran (born February 13, 1979) is an American singer, best known as the frontman for Los Angeles–based punk band The Bronx and Mariachi El Bronx. In addition to The Bronx, Caughthran is invo
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 0xa18dd8d43fc2d326446fad05b0f0b68b05e68efb279fd620ecc357bef2f4af1e. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce3099d8-c0de-4f19-a2be-a48fee0aff23.json and https://artists.proofprofile.net/proofs/artist/ce3099d8-c0de-4f19-a2be-a48fee0aff23.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).