Thomas Joseph McCaffrey (21 December 1905 – 5 February 1975) was an Australian rules footballer who played with Fitzroy in the Victorian Football League (VFL). McCaffrey later served in the Royal Aus
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 0xb4d81c87e13a5a11d63962964318e930814504699761a95568d745c8d0ae2672. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32998323-0016-4b2f-a459-722c5bf834e2.json and https://artists.proofprofile.net/proofs/artist/32998323-0016-4b2f-a459-722c5bf834e2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).