Michael Henderson
type: MusicGroup
description: 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
popularity: 5
followers: 20
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4c1cd463a46a8abdb3ea540ce019aefb58bee6e3eb46589bd9b8d99e9acffce2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8080a41a-0fa8-4df5-a726-eb8923fcb8fb.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8080a41a-0fa8-4df5-a726-eb8923fcb8fb.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/8080a41a-0fa8-4df5-a726-eb8923fcb8fb
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4c1cd463a46a8abdb3ea540ce019aefb58bee6e3eb46589bd9b8d99e9acffce2","name":"Michael Henderson","registered_at":"2026-06-17T10:21:54Z","symbol":"NIM1365407","token_address":"0x8aad3d484bfe1dd4b384e612d2a2e58d6da07761","type":"artist","uuid":"8080a41a-0fa8-4df5-a726-eb8923fcb8fb"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: 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).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0x4c1cd463a46a8abdb3ea540ce019aefb58bee6e3eb46589bd9b8d99e9acffce2","name":"Michael Henderson","registered_at":"2026-06-17T10:21:54Z","symbol":"NIM1365407","token_address":"0x8aad3d484bfe1dd4b384e612d2a2e58d6da07761","type":"artist","uuid":"8080a41a-0fa8-4df5-a726-eb8923fcb8fb"}