Matteus Hellstrand
type: MusicGroup
popularity: 2
followers: 22
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x66556e00b18da2daff95d8eadf630d6f8a22186b38dfa2389cdec4be6328916c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953928
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953928
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1e4e2f32-63d2-4da2-bcc7-9cebf5000ea4.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1e4e2f32-63d2-4da2-bcc7-9cebf5000ea4.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1e4e2f32-63d2-4da2-bcc7-9cebf5000ea4
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T10:21:55Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x66556e00b18da2daff95d8eadf630d6f8a22186b38dfa2389cdec4be6328916c","name":"Matteus Hellstrand","registered_at":"2026-06-16T00:00:21Z","symbol":"NIM0873452","token_address":"0xb03e26eb8f6a633bb3539645bb6c9638954d373f","type":"artist","uuid":"1e4e2f32-63d2-4da2-bcc7-9cebf5000ea4"}
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 0x66556e00b18da2daff95d8eadf630d6f8a22186b38dfa2389cdec4be6328916c. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e4e2f32-63d2-4da2-bcc7-9cebf5000ea4.json and https://artists.proofprofile.net/proofs/artist/1e4e2f32-63d2-4da2-bcc7-9cebf5000ea4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T13:28:01Z
  text: {"copyright_id":"0x66556e00b18da2daff95d8eadf630d6f8a22186b38dfa2389cdec4be6328916c","name":"Matteus Hellstrand","registered_at":"2026-06-16T00:00:21Z","symbol":"NIM0873452","token_address":"0xb03e26eb8f6a633bb3539645bb6c9638954d373f","type":"artist","uuid":"1e4e2f32-63d2-4da2-bcc7-9cebf5000ea4"}
album: Kärlek Utan Ängslan
  type: MusicAlbum
  date published: 2025-05-30
  track: Kärlek Utan Ängslan
    type: MusicRecording
    duration: PT3M37S
    duration ms: 217013
    explicit: false
    by artist: Matteus Hellstrand
    in album: Kärlek Utan Ängslan
      type: MusicAlbum
      date published: 2025-05-30
    isrc code: SEY6X2500201
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T06:43:40+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x36c275436b093ff32589252232b254b682c26ff9e8864917259007361f524676
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958839
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958839
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEY6X2500201
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T09:46:24Z
    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 0x36c275436b093ff32589252232b254b682c26ff9e8864917259007361f524676. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:46:24Z), 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/SEY6X2500201.
      date published: 2026-07-20T09:46:24Z
    audio: Kärlek Utan Ängslan
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 126.006
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.648
      additional property: Energy
        type: PropertyValue
        value: 0.884
      additional property: Speechiness
        type: PropertyValue
        value: 0.047
      additional property: Acousticness
        type: PropertyValue
        value: 0.088
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.303
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.624
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.807
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Major