David Henrard (born 13 April 1973), also known by his stage name JD Davis and Dave Davis, is a Belgian musician. He started his career in music at the age of 17 when he moved to Antwerp to work at Bo
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 0xeb5035f08dc9a862efbd7d53860e52620fb1f7ad11c85573c2901714fa2ed591. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d9a3c63-8c0c-4b57-b104-67c0f0f5892b.json and https://artists.proofprofile.net/proofs/artist/0d9a3c63-8c0c-4b57-b104-67c0f0f5892b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).