Gerlo Hesselink Quartet
type: MusicGroup
genre: jazz
popularity: 20
followers: 444
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0xe395c1097343128dc5ff173dcb254afa648b09d2719e0ee0a63ca4481c04b95a
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953620
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1dba30a4-eeab-4b57-8246-bae03004227a.ots
additional property: OTSRecordURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1dba30a4-eeab-4b57-8246-bae03004227a
additional property: OTSTimestamp
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  value: 2026-06-14T09:36:10Z
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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe395c1097343128dc5ff173dcb254afa648b09d2719e0ee0a63ca4481c04b95a. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1dba30a4-eeab-4b57-8246-bae03004227a.json and https://artists.proofprofile.net/proofs/artist/1dba30a4-eeab-4b57-8246-bae03004227a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T09:42:57Z
  text: {"copyright_id":"0xe395c1097343128dc5ff173dcb254afa648b09d2719e0ee0a63ca4481c04b95a","name":"Gerlo Hesselink Quartet","registered_at":"2026-06-14T07:33:47Z","symbol":"NIM0382739","token_address":"0x7d4ddae7010cf988d3d3980fcb62bd798524e6a2","type":"artist","uuid":"1dba30a4-eeab-4b57-8246-bae03004227a"}
album: Meant for You
  type: MusicAlbum
  date published: 2022-09-25
album: Meant for You
  type: MusicAlbum
  date published: 2022-10-10
  track: Meant for You
    type: MusicRecording
    duration: PT4M8S
    duration ms: 248142
    explicit: false
    by artist: Gerlo Hesselink Quartet
    in album: Meant for You
      type: MusicAlbum
      date published: 2022-10-10
    genre: jazz
    isrc code: NLXZ82200008
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
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    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLXZ82200008
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-13T18:21:04Z
    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 0x0b9c484e07db71fe10b5a50ef26f253b392ed10c9ac341615e7dc4c7461f2ede. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NLXZ82200008.
      date published: 2026-07-13T18:21:04Z
    audio: Meant for You
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 108.571
      additional property: Musical Key
        type: PropertyValue
        value: 3
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
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      additional property: Energy
        type: PropertyValue
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      additional property: Speechiness
        type: PropertyValue
        value: 0.036
      additional property: Acousticness
        type: PropertyValue
        value: 0.973
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.136
      additional property: Liveness
        type: PropertyValue
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      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.173
      additional property: Loudness (dB)
        type: PropertyValue
        value: -15.021
      additional property: Key Name
        type: PropertyValue
        value: Eb
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Remembering
  type: MusicAlbum
  date published: 2023-05-08
album: Romy
  type: MusicAlbum
  date published: 2024-10-01
album: Andira
  type: MusicAlbum
  date published: 2024-11-01
album: Meant for You 2
  type: MusicAlbum
  date published: 2024-12-08
  track: Leipzig
    type: MusicRecording
    duration: PT4M46S
    duration ms: 286101
    explicit: false
    by artist: Gerlo Hesselink Quartet
    in album: Meant for You 2
      type: MusicAlbum
      date published: 2024-12-08
    genre: jazz
    isrc code: NLXZ82400006
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
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    additional property: OTSBitcoinBlock
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    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
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    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLXZ82400006
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T01:12:41Z
    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 0x6acfdbe9b5964d30cd6cb225054a80bb382084f27226a3448ac4544d77db5250. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLXZ82400006.
      date published: 2026-07-05T01:12:41Z
    audio: Leipzig
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 168.214
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.317
      additional property: Energy
        type: PropertyValue
        value: 0.332
      additional property: Speechiness
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name

Speechiness
type: PropertyValue
value: 0.033

Acousticness
type: PropertyValue
value: 0.824

Instrumentalness
type: PropertyValue
value: 0.201

Liveness
type: PropertyValue
value: 0.146

Valence (Positivity)
type: PropertyValue
value: 0.08

Loudness (dB)
type: PropertyValue
value: -8.549

Key Name
type: PropertyValue
value: C#

Mode Name
type: PropertyValue
value: Major