Karlijn Langendijk
type: MusicGroup
popularity: 19
followers: 1519
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1bd41eb94b1cafbb86b269ed86919c1d74b25b50aa26ddeba931766100abf621
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953674
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953674
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5ceff93c-4d61-480a-9959-e14b14c67dea.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5ceff93c-4d61-480a-9959-e14b14c67dea.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5ceff93c-4d61-480a-9959-e14b14c67dea
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T19:07:16Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1bd41eb94b1cafbb86b269ed86919c1d74b25b50aa26ddeba931766100abf621","name":"Karlijn Langendijk","registered_at":"2026-06-14T14:16:12Z","symbol":"NIM0478730","token_address":"0xef141844651903cfce8baf890cecfa2f82e2e53f","type":"artist","uuid":"5ceff93c-4d61-480a-9959-e14b14c67dea"}
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
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd41eb94b1cafbb86b269ed86919c1d74b25b50aa26ddeba931766100abf621. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ceff93c-4d61-480a-9959-e14b14c67dea.json and https://artists.proofprofile.net/proofs/artist/5ceff93c-4d61-480a-9959-e14b14c67dea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T21:49:28Z
  text: {"copyright_id":"0x1bd41eb94b1cafbb86b269ed86919c1d74b25b50aa26ddeba931766100abf621","name":"Karlijn Langendijk","registered_at":"2026-06-14T14:16:12Z","symbol":"NIM0478730","token_address":"0xef141844651903cfce8baf890cecfa2f82e2e53f","type":"artist","uuid":"5ceff93c-4d61-480a-9959-e14b14c67dea"}
album: Leap of Faith
  type: MusicAlbum
  date published: 2015
album: Luna
  type: MusicAlbum
  date published: 2017-07-07
album: Meraki
  type: MusicAlbum
  date published: 2019-12-12
  track: Sukha
    type: MusicRecording
    duration: PT3M51S
    duration ms: 231000
    explicit: false
    by artist: Karlijn Langendijk
    in album: Meraki
      type: MusicAlbum
      date published: 2019-12-12
    isrc code: DELJ81963672
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T06:10:44+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xf6459169c88f4692068c50a790b1ffc5dce15b574e4c3e4676f24b8e91dd5737
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958686
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958686
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81963672
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T06:43:29Z
    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 0xf6459169c88f4692068c50a790b1ffc5dce15b574e4c3e4676f24b8e91dd5737. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/DELJ81963672.
      date published: 2026-07-19T06:43:29Z
    audio: Sukha
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 144.653
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.381
      additional property: Energy
        type: PropertyValue
        value: 0.18
      additional property: Speechiness
        type: PropertyValue
        value: 0.052
      additional property: Acousticness
        type: PropertyValue
        value: 0.986
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.915
      additional property: Liveness
        type: PropertyValue
        value: 0.081
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.177
      additional property: Loudness (dB)
        type: PropertyValue
        value: -17.258
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: The Golden Hour
  type: MusicAlbum
  date published: 2020-06-05
  track: The Golden Hour
    type: MusicRecording
    duration: PT4M23S
    duration ms: 263880
    explicit: false
    by artist: Karlijn Langendijk
    in album: The Golden Hour
      type: MusicAlbum
      date published: 2020-06-05
    isrc code: DELJ82026664
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T09:29:10+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x6d7c83625e38ad5373b285a9ce0a90b792a6c9c812a7c77eb7ed9fafebe8dd10
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958531
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958531
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ82026664
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T09:39:18Z
    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 0x6d7c83625e38ad5373b285a9ce0a90b792a6c9c812a7c77eb7ed9fafebe8dd10. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/DELJ82026664.
      date published: 2026-07-18T09:39:18Z
    audio: The Golden Hour
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 170.707
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.363
      additional property: Energy
        type: PropertyValue
        value: 0.158
      additional property: Speechiness
        type: PropertyValue
        value: 0.068
      additional property: Acousticness
        type: PropertyValue
        value: 0.971
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.933
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Sea Waves
album: Atlas
album: Winter
album: Armando's Rhumba
album: Khazān
album: Shams
album: PHASES
album: Miramare

Liveness
type: PropertyValue
value: 0.117

Valence (Positivity)
type: PropertyValue
value: 0.117

Loudness (dB)
type: PropertyValue
value: -20.841

Key Name
type: PropertyValue
value: C

Mode Name
type: PropertyValue
value: Major

Sea Waves
type: MusicAlbum
date published: 2021-02-16

The Golden Hour
type: MusicAlbum
date published: 2021-11-19

The Golden Hour
type: MusicAlbum
date published: 2021-11-19

Atlas
type: MusicAlbum
date published: 2022-02-11

Winter
type: MusicAlbum
date published: 2022-03-04

Atlas
type: MusicAlbum
date published: 2022-03-11

Armando's Rhumba
type: MusicAlbum
date published: 2023-08-11

Winter
type: MusicAlbum
date published: 2025-02-28

Khazān
type: MusicAlbum
date published: 2025-03-28

Shams
type: MusicAlbum
date published: 2025-04-25

PHASES
type: MusicAlbum
date published: 2025-05-23

Miramare
type: MusicAlbum
date published: 2025-10-10