Julia Barfield
type: MusicGroup
description: Julia Barfield, , (born 1952) is a British architect and director of Marks Barfield Architects, established in 1989. Barfield created the London Eye together with husband and partner David Marks. Barf
popularity: 6
followers: 188
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0x5dc27697d38be53ed703e1e7556d9cc67019c97179679b77286a1fd9e40bb3f2
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
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additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bf306a98-0759-4e9e-9f61-c9c7f9d10b1b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/bf306a98-0759-4e9e-9f61-c9c7f9d10b1b
additional property: OTSTimestamp
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  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
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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
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  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc27697d38be53ed703e1e7556d9cc67019c97179679b77286a1fd9e40bb3f2. 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/bf306a98-0759-4e9e-9f61-c9c7f9d10b1b.json and https://artists.proofprofile.net/proofs/artist/bf306a98-0759-4e9e-9f61-c9c7f9d10b1b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x5dc27697d38be53ed703e1e7556d9cc67019c97179679b77286a1fd9e40bb3f2","name":"Julia Barfield","registered_at":"2026-06-20T18:46:23Z","symbol":"NIM1682345","token_address":"0x1733eaf5473d250bd2b742d2fac0dc0c8220fc43","type":"artist","uuid":"bf306a98-0759-4e9e-9f61-c9c7f9d10b1b"}
album: Keep to Me
  type: MusicAlbum
  date published: 2025-01-10
  track: Keep to Me
    type: MusicRecording
    duration: PT4M25S
    duration ms: 265000
    explicit: false
    by artist: Julia Barfield
    in album: Keep to Me
      type: MusicAlbum
      date published: 2025-01-10
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    additional property: CopyrightStatus
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      type: PropertyValue
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    additional property: OTSVerificationAPI
      type: PropertyValue
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T19:27:56Z
    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
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e446336d5aefe64bab2de5e80ce3ba09943797df3fc8b0980096566ae88e8ab. 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/QT3EY2418394.
      date published: 2026-07-05T19:27:56Z
    audio: Keep to Me
      type: AudioObject
      additional property: Tempo (BPM)
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      additional property: Musical Key
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      additional property: Mode (Major/Minor)
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      additional property: Time Signature
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      additional property: Danceability
        type: PropertyValue
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      additional property: Energy
        type: PropertyValue
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      additional property: Speechiness
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      additional property: Acousticness
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      additional property: Instrumentalness
        type: PropertyValue
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      additional property: Liveness
        type: PropertyValue
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      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.408
      additional property: Loudness (dB)
        type: PropertyValue
        value: -10.412
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Keep to Me
  type: MusicAlbum
  date published: 2025-02-21
  track: Making Time
    type: MusicRecording
    duration: PT4M12S
    duration ms: 252200
    explicit: false
    by artist: Julia Barfield
    in album: Keep to Me
      type: MusicAlbum
      date published: 2025-02-21
    isrc code: QT3F32417934
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
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    additional property: CopyrightChainExplorerURL
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    additional property: OTSBitcoinBlockVerifyURL
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    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3F32417934
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T01:25:57Z
    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
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ded1070c0f2e6d94d4a34c18dcd17d4456d184c119363635a0f3900a2b43abb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT3F32417934.
      date published: 2026-07-06T01:25:57Z
    audio: Making Time
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 155.366
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.364
      additional property: Energy
        type: PropertyValue
        value: 0.409
      additional property: Speechiness
        type: PropertyValue
        value: 0.03
      additional property: Acousticness
        type: PropertyValue
        value: 0.582
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.099
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name

Valence (Positivity)
type: PropertyValue
value: 0.26

Loudness (dB)
type: PropertyValue
value: -8.16

Key Name
type: PropertyValue
value: Bb

Mode Name
type: PropertyValue
value: Major