Joseph Bonner, also commonly known by the nickname Spanner Banner, is a Jamaican reggae and dancehall musician. He is one of the Bonner brothers, all of whom are successful reggae artists, including P
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 0x78b0016a8cf95d7473d99f0868362c5dc8726d433626828eb5623e640d862dd0. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2a0fb53-26b4-4d8c-b121-f7d40a153c82.json and https://artists.proofprofile.net/proofs/artist/f2a0fb53-26b4-4d8c-b121-f7d40a153c82.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).