Michael Earl Henderson (July 7, 1951 – July 19, 2022) was an American bass guitarist and vocalist. He was known for his work with Miles Davis in the early 1970s on early fusion albums such as Jack Joh
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 0x4c1cd463a46a8abdb3ea540ce019aefb58bee6e3eb46589bd9b8d99e9acffce2. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8080a41a-0fa8-4df5-a726-eb8923fcb8fb.json and https://artists.proofprofile.net/proofs/artist/8080a41a-0fa8-4df5-a726-eb8923fcb8fb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).