David Duffy
type: MusicGroup
description: David Cameron Duffy (born September 1, 1953)U.S. Public Records Index Volume 1 (Provo, Utah: Ancestry.com Operations, Inc.), 2010. is an American professor of botany and zoology at the University of H
popularity: 8
followers: 280
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953909
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  value: https://artists.proofprofile.net/proofs/artist/0785a29e-f106-496d-911c-261544c045fe.ots
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  value: https://artists.proofprofile.net/proofs/artist/0785a29e-f106-496d-911c-261544c045fe.json
additional property: OTSVerificationAPI
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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0785a29e-f106-496d-911c-261544c045fe
additional property: OTSTimestamp
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  value: 2026-06-16T07:53:13Z
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  value: {"copyright_id":"0x203c4972c80021fbef446ff80ec113bd2537be33ea6dd46cf5b68d73d6139cca","name":"David Duffy","registered_at":"2026-06-15T16:02:22Z","symbol":"NIM0759424","token_address":"0x14685046ca0751828207214554da170a76b9fd0e","type":"artist","uuid":"0785a29e-f106-496d-911c-261544c045fe"}
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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203c4972c80021fbef446ff80ec113bd2537be33ea6dd46cf5b68d73d6139cca. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0785a29e-f106-496d-911c-261544c045fe.json and https://artists.proofprofile.net/proofs/artist/0785a29e-f106-496d-911c-261544c045fe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:53:13Z
  text: {"copyright_id":"0x203c4972c80021fbef446ff80ec113bd2537be33ea6dd46cf5b68d73d6139cca","name":"David Duffy","registered_at":"2026-06-15T16:02:22Z","symbol":"NIM0759424","token_address":"0x14685046ca0751828207214554da170a76b9fd0e","type":"artist","uuid":"0785a29e-f106-496d-911c-261544c045fe"}
album: Riuchi (Original Score)
  type: MusicAlbum
  date published: 2020-05-17
album: Mawu
  type: MusicAlbum
  date published: 2020-06-26
album: Mawu
  type: MusicAlbum
  date published: 2020-06-26
  track: Fractal
    type: MusicRecording
    duration: PT4M11S
    duration ms: 251019
    explicit: false
    by artist: David Duffy
    in album: Mawu
      type: MusicAlbum
      date published: 2020-06-26
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    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6I32057832
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T04:58:13Z
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0x16606be6d54eaa255c94a23342a5d7a66c9baa6aaf188c0f5f41aeabe0b58957. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6I32057832.
      date published: 2026-07-21T04:58:13Z
    audio: Fractal
      type: AudioObject
      additional property: Tempo (BPM)
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      additional property: Mode (Major/Minor)
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      additional property: Speechiness
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      additional property: Instrumentalness
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      additional property: Liveness
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      additional property: Valence (Positivity)
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      additional property: Loudness (dB)
        type: PropertyValue
        value: -16.818
      additional property: Key Name
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      additional property: Mode Name
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album: Sueño
  type: MusicAlbum
  date published: 2021-03-12
album: Shadow
  type: MusicAlbum
  date published: 2021-10-08
album: Stillness
  type: MusicAlbum
  date published: 2021-11-05
album: Self
  type: MusicAlbum
  date published: 2022-01-28