Leon "Ndugu" Chancler
type: MusicGroup
description: Leon "Ndugu" Chancler ( ; July 1, 1952 – February 3, 2018) was an American R&B, funk, and jazz drummer. He was also a composer, producer, and university professor. Biography Early life Born in Shreve
popularity: 8
followers: 282
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd524d0ae8eef5de1fdb651dfdba47209753412f289244bb441206f9f7a8bee7a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/71b1c880-1083-4f78-9add-fd4691cdbb47.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/71b1c880-1083-4f78-9add-fd4691cdbb47.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/71b1c880-1083-4f78-9add-fd4691cdbb47
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd524d0ae8eef5de1fdb651dfdba47209753412f289244bb441206f9f7a8bee7a","name":"Leon \"Ndugu\" Chancler","registered_at":"2026-06-17T05:36:40Z","symbol":"NIM1297407","token_address":"0xf2fe20881768359bac90570825e0c76afde6a838","type":"artist","uuid":"71b1c880-1083-4f78-9add-fd4691cdbb47"}
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 0xd524d0ae8eef5de1fdb651dfdba47209753412f289244bb441206f9f7a8bee7a. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71b1c880-1083-4f78-9add-fd4691cdbb47.json and https://artists.proofprofile.net/proofs/artist/71b1c880-1083-4f78-9add-fd4691cdbb47.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xd524d0ae8eef5de1fdb651dfdba47209753412f289244bb441206f9f7a8bee7a","name":"Leon \"Ndugu\" Chancler","registered_at":"2026-06-17T05:36:40Z","symbol":"NIM1297407","token_address":"0xf2fe20881768359bac90570825e0c76afde6a838","type":"artist","uuid":"71b1c880-1083-4f78-9add-fd4691cdbb47"}
album: Buddy Collette Big Band in Concert
  type: MusicAlbum
  date published: 2000-01-01