Matthew McCarthy (born 14 December 1981) is a former Australian rules footballer for the Geelong Football Club in the Australian Football League (AFL), playing 22 games between 2003 and 2006. He is t
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 0x8a5013e7f2067a6a1a50e53af1b2be441af5bb2c854ee1568bc46e10675c1da7. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14c3c2cf-89fb-4af4-bfd8-bb85e095e6a9.json and https://artists.proofprofile.net/proofs/artist/14c3c2cf-89fb-4af4-bfd8-bb85e095e6a9.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.