Eddie C. Campbell
type: MusicGroup
genre: blues
genre: classic blues
genre: modern blues
description: Eddie C. Campbell (May 6, 1939 – November 20, 2018) was an American blues guitarist and singer in the Chicago blues scene. Biography Campbell was born in Duncan, Mississippi. He moved to Chicago at
popularity: 4
followers: 2986
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf41a8e5de16c0d51a72b9f4792da1c4d172cc686e334b4e823d460a4e2e059ca
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/e0c24ab3-6de6-477d-89fa-11f9b148c9ea.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e0c24ab3-6de6-477d-89fa-11f9b148c9ea.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e0c24ab3-6de6-477d-89fa-11f9b148c9ea
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf41a8e5de16c0d51a72b9f4792da1c4d172cc686e334b4e823d460a4e2e059ca","name":"Eddie C. Campbell","registered_at":"2026-06-21T06:26:44Z","symbol":"NIM1847552","token_address":"0x70115da75daa5ce15e5c8d21650c0dc5647988fa","type":"artist","uuid":"e0c24ab3-6de6-477d-89fa-11f9b148c9ea"}
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 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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41a8e5de16c0d51a72b9f4792da1c4d172cc686e334b4e823d460a4e2e059ca. 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/e0c24ab3-6de6-477d-89fa-11f9b148c9ea.json and https://artists.proofprofile.net/proofs/artist/e0c24ab3-6de6-477d-89fa-11f9b148c9ea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0xf41a8e5de16c0d51a72b9f4792da1c4d172cc686e334b4e823d460a4e2e059ca","name":"Eddie C. Campbell","registered_at":"2026-06-21T06:26:44Z","symbol":"NIM1847552","token_address":"0x70115da75daa5ce15e5c8d21650c0dc5647988fa","type":"artist","uuid":"e0c24ab3-6de6-477d-89fa-11f9b148c9ea"}
album: American Blues Legends 79
  type: MusicAlbum
  date published: 1979-01-01
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  type: MusicAlbum
  date published: 2021-06-28