Geoffrey Castle
type: MusicGroup
genre: celtic
description: Geoffrey Castle is a musician and violinist based in Kirkland, WA. Castle performs on the electric six-string violin music from a range of genres, including Hendrix, Celtic, Bluegrass, and Mozart.
popularity: 6
followers: 1262
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additional property: CopyrightChainExplorerURL
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additional property: OTSVerifyInstructions
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  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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9265b062832ee55e891b9f6494d8bfbdbeae28282005a0ad5fbfe93ec8b435. 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/0e691ad3-24dc-47cf-b1bc-4eac44aeca81.json and https://artists.proofprofile.net/proofs/artist/0e691ad3-24dc-47cf-b1bc-4eac44aeca81.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:53:13Z
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album: Underhill's Angel
  type: MusicAlbum
  date published: 2007-12-01
album: Streets of Inwood
  type: MusicAlbum
  date published: 2009
album: The Deep Well Sessions, Vol. 1
  type: MusicAlbum
  date published: 2012-07-19
  track: Mist On the Mountain
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    duration: PT6M43S
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    by artist: Geoffrey Castle
    in album: The Deep Well Sessions, Vol. 1
      type: MusicAlbum
      date published: 2012-07-19
    genre: celtic
    isrc code: US6CR1200029
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    additional property: OTSTimestamp
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    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa72bd1f3be19d71a6902c011349f28843be7bb9ac6a58df282650144e6460bf. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US6CR1200029.
      date published: 2026-07-05T19:27:56Z
    audio: Mist On the Mountain
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 113.012
      additional property: Musical Key
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        value: 4
      additional property: Mode (Major/Minor)
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        type: PropertyValue
        value: 4
      additional property: Danceability
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      additional property: Energy
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      additional property: Speechiness
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      additional property: Acousticness
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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)
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      additional property: Key Name
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        value: E
      additional property: Mode Name
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        value: Minor
album: Deep Well Sessions, Vol. 2
  type: MusicAlbum
  date published: 2014-03-17
album: Noel: A Celtic Christmas Celebration
  type: MusicAlbum
  date published: 2015-12-01
album: Celtic Night
  type: MusicAlbum
  date published: 2017-03-17