Laura Sjin
type: MusicGroup
genre: nederpop
popularity: 15
followers: 830
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x63495bc6fd920ea624a46aafbc86c3b36e63c4db0f1b72a32d3737256de654ad
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953687
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953687
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6929dfe5-8561-410a-810f-4dc1001c592d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6929dfe5-8561-410a-810f-4dc1001c592d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/6929dfe5-8561-410a-810f-4dc1001c592d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T20:19:15Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x63495bc6fd920ea624a46aafbc86c3b36e63c4db0f1b72a32d3737256de654ad","name":"Laura Sjin","registered_at":"2026-06-14T15:32:56Z","symbol":"NIM0497053","token_address":"0x912617d3e8658e60c73dca656710e81c18148950","type":"artist","uuid":"6929dfe5-8561-410a-810f-4dc1001c592d"}
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 0x63495bc6fd920ea624a46aafbc86c3b36e63c4db0f1b72a32d3737256de654ad. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6929dfe5-8561-410a-810f-4dc1001c592d.json and https://artists.proofprofile.net/proofs/artist/6929dfe5-8561-410a-810f-4dc1001c592d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T22:00:24Z
  text: {"copyright_id":"0x63495bc6fd920ea624a46aafbc86c3b36e63c4db0f1b72a32d3737256de654ad","name":"Laura Sjin","registered_at":"2026-06-14T15:32:56Z","symbol":"NIM0497053","token_address":"0x912617d3e8658e60c73dca656710e81c18148950","type":"artist","uuid":"6929dfe5-8561-410a-810f-4dc1001c592d"}
album: Tot Die Tijd
  type: MusicAlbum
  date published: 2017-10-08
album: Tot Die Tijd
  type: MusicAlbum
  date published: 2017-10-10
album: Wat Je Voelt
  type: MusicAlbum
  date published: 2017-12-12
album: Als Ik Droom
  type: MusicAlbum
  date published: 2018-02-02
album: Buurjongen
  type: MusicAlbum
  date published: 2018-12-04
album: alles wat je zegt
  type: MusicAlbum
  date published: 2021-03-12
album: misschien
  type: MusicAlbum
  date published: 2021-04-23
album: of ik jou nog mis
  type: MusicAlbum
  date published: 2021-06-04
album: voor ons bedoeld
  type: MusicAlbum
  date published: 2022-04-29
album: (dat ik het) ook zo (zie)
  type: MusicAlbum
  date published: 2022-06-03
album: zondag
  type: MusicAlbum
  date published: 2022-08-19
album: dingen die toch wel gaan gebeuren
  type: MusicAlbum
  date published: 2022-09-09
album: gewoon een dag
  type: MusicAlbum
  date published: 2022-12-02
album: ook zo (winter versie)
  type: MusicAlbum
  date published: 2023-01-06
album: buikpijn
  type: MusicAlbum
  date published: 2023-06-23
album: ik weet nu beter
  type: MusicAlbum
  date published: 2023-08-11
album: anders dan ik was
  type: MusicAlbum
  date published: 2023-09-08
album: met jou
  type: MusicAlbum
  date published: 2024-10-11
album: bij de singel
  type: MusicAlbum
  date published: 2024-11-22
  track: bij de singel
    type: MusicRecording
    duration: PT2M22S
    duration ms: 142833
    explicit: false
    by artist: Laura Sjin
    in album: bij de singel
      type: MusicAlbum
      date published: 2024-11-22
    genre: nederpop
    isrc code: NLN5U2400005
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T18:59:25+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xe47de6ceae6011aafa28b822d0d9481b91ee811da031e87d2dabce6338964412
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958771
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958771
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLN5U2400005
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T22:01:01Z
    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 0xe47de6ceae6011aafa28b822d0d9481b91ee811da031e87d2dabce6338964412. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:01:01Z), 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/NLN5U2400005.
      date published: 2026-07-19T22:01:01Z
    audio: bij de singel
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 102.015
      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: 0.764
      additional property: Energy
        type: PropertyValue
        value: 0.272
      additional property: Speechiness
        type: PropertyValue
        value: 0.034
      additional property: Acousticness
        type: PropertyValue
        value: 0.374
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.667
      additional property: Liveness
        type: PropertyValue
        value: 0.111
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.856
      additional property: Loudness (dB)
        type: PropertyValue
        value: -14.573
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: niet meer zo
  type: MusicAlbum
  date published: 2025-01-23
album: zullen we zo zijn?
  type: MusicAlbum
  date published: 2025-02-28
  track: alsof het kon
    type: MusicRecording
    duration: PT2M48S
    duration ms: 168850
    explicit: false
    by artist: Laura Sjin
    in album: zullen we zo zijn?
      type: MusicAlbum
      date published: 2025-02-28
    genre: nederpop
    isrc code: NLN5U2400003
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
    additional property: CopyrightChainExplorerURL
    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: alsof het kon

CopyrightRegisteredAt
type: PropertyValue
value: 2026-07-19T09:58:02+00:00

CopyrightChainExplorerURL
type: PropertyValue
value: https://explorer.copyrightchains.com/tx/0xa882b921a719b541bcc52fa709e600d1ff38fae90cc6ee06d6ed2b524790f6db

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 958716

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/958716

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLN5U2400003

OTSTimestamp
type: PropertyValue
value: 2026-07-19T10:15:55Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa882b921a719b541bcc52fa709e600d1ff38fae90cc6ee06d6ed2b524790f6db. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/NLN5U2400003.
date published: 2026-07-19T10:15:55Z

alsof het kon
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 105.02
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: 0.807
additional property: Energy
  type: PropertyValue
  value: 0.394
additional property: Speechiness
  type: PropertyValue
  value: 0.04
additional property: Acousticness
  type: PropertyValue
  value: 0.733
additional property: Instrumentalness
  type: PropertyValue
  value: 0.094
additional property: Liveness
  type: PropertyValue
  value: 0.111
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.661
additional property: Loudness (dB)
  type: PropertyValue
  value: -12.157
additional property: Key Name
  type: PropertyValue
  value: C
additional property: Mode Name
  type: PropertyValue
  value: Major