The Four Of Us
type: MusicGroup
popularity: 8
followers: 12
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xcd284b89911e62ac0733a6346e2e8754a179a653643e097814e0084e4cef9442
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954516
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954516
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a107a058-1911-4e09-baf2-16b0d341e195.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a107a058-1911-4e09-baf2-16b0d341e195.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a107a058-1911-4e09-baf2-16b0d341e195
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T07:04:44Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xcd284b89911e62ac0733a6346e2e8754a179a653643e097814e0084e4cef9442","name":"The Four Of Us","registered_at":"2026-06-20T05:42:23Z","symbol":"NIM1529717","token_address":"0x1fe7c7d6d97415334d1934ca92f5a69db1113652","type":"artist","uuid":"a107a058-1911-4e09-baf2-16b0d341e195"}
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 0xcd284b89911e62ac0733a6346e2e8754a179a653643e097814e0084e4cef9442. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a107a058-1911-4e09-baf2-16b0d341e195.json and https://artists.proofprofile.net/proofs/artist/a107a058-1911-4e09-baf2-16b0d341e195.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T07:04:44Z
  text: {"copyright_id":"0xcd284b89911e62ac0733a6346e2e8754a179a653643e097814e0084e4cef9442","name":"The Four Of Us","registered_at":"2026-06-20T05:42:23Z","symbol":"NIM1529717","token_address":"0x1fe7c7d6d97415334d1934ca92f5a69db1113652","type":"artist","uuid":"a107a058-1911-4e09-baf2-16b0d341e195"}
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  type: MusicAlbum
  date published: 2020-08-02
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  type: MusicAlbum
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  type: MusicAlbum
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  type: MusicAlbum
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