William Boazman, known as Sonny Black, is an acoustic guitarist based in the UK, who plays blues, rags and original compositions usually fingerstyle or slide. "Sonny Black" is a pseudonym adopted when
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 0x6b0ea84038eb96e83a086aa5ef66ea0c3292547c5425ddead1abe5d335bb54bb. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ddf0ea47-7d92-47c2-941e-384c1fbcee3d.json and https://artists.proofprofile.net/proofs/artist/ddf0ea47-7d92-47c2-941e-384c1fbcee3d.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Live & Loud: The Ghost of Sonny Black (Unused Beatz)