Joey Hartkamp
type: MusicGroup
popularity: 17
followers: 2376
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xacb5f49785ae0c9ac2d2167d6f0c44f12cab5416f0c694fa31fd0c14b3e18f45
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953704
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953704
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7b0f833e-37fc-484c-a939-1319ca938295.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7b0f833e-37fc-484c-a939-1319ca938295.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7b0f833e-37fc-484c-a939-1319ca938295
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T22:58:38Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xacb5f49785ae0c9ac2d2167d6f0c44f12cab5416f0c694fa31fd0c14b3e18f45","name":"Joey Hartkamp","registered_at":"2026-06-14T17:25:23Z","symbol":"NIM0523883","token_address":"0xca5d8a6e69ecd55554e36defc0094fdc6ac19f41","type":"artist","uuid":"7b0f833e-37fc-484c-a939-1319ca938295"}
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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb5f49785ae0c9ac2d2167d6f0c44f12cab5416f0c694fa31fd0c14b3e18f45. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b0f833e-37fc-484c-a939-1319ca938295.json and https://artists.proofprofile.net/proofs/artist/7b0f833e-37fc-484c-a939-1319ca938295.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T22:58:38Z
  text: {"copyright_id":"0xacb5f49785ae0c9ac2d2167d6f0c44f12cab5416f0c694fa31fd0c14b3e18f45","name":"Joey Hartkamp","registered_at":"2026-06-14T17:25:23Z","symbol":"NIM0523883","token_address":"0xca5d8a6e69ecd55554e36defc0094fdc6ac19f41","type":"artist","uuid":"7b0f833e-37fc-484c-a939-1319ca938295"}
album: Geen Nacht Meer Zonder Jou
  type: MusicAlbum
  date published: 2013-09-06
album: Ik Wil Je
  type: MusicAlbum
  date published: 2014-09-12
album: Jij
  type: MusicAlbum
  date published: 2014-11-16
album: Hoor Je M'n Hart
  type: MusicAlbum
  date published: 2015-06-05
album: Hoor Je M'n Hart
  type: MusicAlbum
  date published: 2015-06-05
album: Chic A Bang Bang
  type: MusicAlbum
  date published: 2015-10-16
album: Chic A Bang Bang
  type: MusicAlbum
  date published: 2015-10-16
album: Dans Met Me Mee
  type: MusicAlbum
  date published: 2016-04-15
album: Dans Met Me Mee
  type: MusicAlbum
  date published: 2016-04-15
  track: Dans Met Me Mee
    type: MusicRecording
    duration: PT3M42S
    duration ms: 222450
    explicit: false
    by artist: Joey Hartkamp
    in album: Dans Met Me Mee
      type: MusicAlbum
      date published: 2016-04-15
    isrc code: NLZ291600064
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T20:29:52+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xb63a11caea26354257b975691efdc8c0c9ffb17ec90972f761b710c2ba64bba3
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956856
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956856
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLZ291600064
    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 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 0xb63a11caea26354257b975691efdc8c0c9ffb17ec90972f761b710c2ba64bba3. 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/NLZ291600064.
      date published: 2026-07-06T01:25:57Z
    audio: Dans Met Me Mee
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 122.061
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.591
      additional property: Energy
        type: PropertyValue
        value: 0.877
      additional property: Speechiness
        type: PropertyValue
        value: 0.034
      additional property: Acousticness
        type: PropertyValue
        value: 0.019
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.068
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.76
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.535
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Kleine Lieve Lach
  type: MusicAlbum
  date published: 2016-11-25
album: Kleine Lieve Lach
  type: MusicAlbum
  date published: 2016-11-25
album: Ik Vind Je Sexy
  type: MusicAlbum
  date published: 2017-06-16
album: Ik Vind Je Sexy
  type: MusicAlbum
  date published: 2017-06-16
album: Hé Jij
  type: MusicAlbum
  date published: 2017-12-22
album: Hé Jij
  type: MusicAlbum
  date published: 2017-12-22
album: Ale Ale Ale
  type: MusicAlbum
  date published: 2018-06-21
album: Ale Ale Ale
  type: MusicAlbum
  date published: 2018-06-21
album: Ik Zie 'N Pils
  type: MusicAlbum
  date published: 2019-05-17
album: Wat Overblijft Zijn Tranen
  type: MusicAlbum
  date published: 2019-11-11
album: Wat Overblijft Zijn Tranen
  type: MusicAlbum
  date published: 2019-11-11
  track: Wat Overblijft Zijn Tranen
    type: MusicRecording
    duration: PT3M37S
    duration ms: 217612
    explicit: false
    by artist: Joey Hartkamp
    in album: Wat Overblijft Zijn Tranen
      type: MusicAlbum
      date published: 2019-11-11
    isrc code: NLZ291900292
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T08:52:44+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x078099b5f2a018f9740a38484d29a7d1161a097534b0965e046fbdc8ac6e16b4
    additional property: OTSHash
    additional property: OTSBitcoinBlock
    additional property: OTSBitcoinBlockVerifyURL
    additional property: OTSVerificationAPI
    additional property: OTSTimestamp
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: Wat Overblijft Zijn Tranen

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 958444

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/958444

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLZ291900292

OTSTimestamp
type: PropertyValue
value: 2026-07-17T19:12:23Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078099b5f2a018f9740a38484d29a7d1161a097534b0965e046fbdc8ac6e16b4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLZ291900292.
date published: 2026-07-17T19:12:23Z

Wat Overblijft Zijn Tranen
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 107.976
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: 0.416
additional property: Energy
  type: PropertyValue
  value: 0.762
additional property: Speechiness
  type: PropertyValue
  value: 0.041
additional property: Acousticness
  type: PropertyValue
  value: 0.257
additional property: Instrumentalness
  type: PropertyValue
  value: 0.001
additional property: Liveness
  type: PropertyValue
  value: 0.13
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.493
additional property: Loudness (dB)
  type: PropertyValue
  value: -4.486
additional property: Key Name
  type: PropertyValue
  value: C
additional property: Mode Name
  type: PropertyValue
  value: Major