Ambrose Campbell
type: MusicGroup
genre: calypso
genre: highlife
description: Ambrose Campbell (19 August 1919 – 22 June 2006) was a Nigerian musician and bandleader. He is credited with forming Britain's first ever black band, the West African Rhythm Brothers, in the 1940s, an
popularity: 2
followers: 366
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe04d35537d8ee6dc8a4b0ca6cb34e0a1e7fc9e4c942ff346839749a84e1cee6a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d005483e-11e5-4eaf-a6ab-719be43a3c21.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d005483e-11e5-4eaf-a6ab-719be43a3c21.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d005483e-11e5-4eaf-a6ab-719be43a3c21
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe04d35537d8ee6dc8a4b0ca6cb34e0a1e7fc9e4c942ff346839749a84e1cee6a","name":"Ambrose Campbell","registered_at":"2026-06-21T00:45:03Z","symbol":"NIM1767377","token_address":"0x5299644cd8ae71c35ca5d3104049a0c15361c138","type":"artist","uuid":"d005483e-11e5-4eaf-a6ab-719be43a3c21"}
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 0xe04d35537d8ee6dc8a4b0ca6cb34e0a1e7fc9e4c942ff346839749a84e1cee6a. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d005483e-11e5-4eaf-a6ab-719be43a3c21.json and https://artists.proofprofile.net/proofs/artist/d005483e-11e5-4eaf-a6ab-719be43a3c21.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0xe04d35537d8ee6dc8a4b0ca6cb34e0a1e7fc9e4c942ff346839749a84e1cee6a","name":"Ambrose Campbell","registered_at":"2026-06-21T00:45:03Z","symbol":"NIM1767377","token_address":"0x5299644cd8ae71c35ca5d3104049a0c15361c138","type":"artist","uuid":"d005483e-11e5-4eaf-a6ab-719be43a3c21"}