Philippe Toussaint (born 30 June 1949) was one of Belgium's most successful golfers. Early life and amateur career Toussaint was born in Brussels. As an amateur he won the Italian Amateur Champions
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 0x5e697850dd89a83e84d173bb073d014439e44369c33e736ec8c2db01d6aef64f. Chain 2 (Bitcoin): anchored in block 954058 (2026-06-17T06:34:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44a78cf6-fe6f-479d-90f3-787b336ff647.json and https://artists.proofprofile.net/proofs/artist/44a78cf6-fe6f-479d-90f3-787b336ff647.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.