CV Biertje aan de Bar
type: MusicGroup
popularity: 2
followers: 46
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe11bc0bbf7993ccecdce1fe2deecc4327f7077c6ca7f8cefb70d31060f8db158
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/77975fb1-b5f6-4301-a223-ba2429b145f7.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/77975fb1-b5f6-4301-a223-ba2429b145f7.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/77975fb1-b5f6-4301-a223-ba2429b145f7
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe11bc0bbf7993ccecdce1fe2deecc4327f7077c6ca7f8cefb70d31060f8db158","name":"CV Biertje aan de Bar","registered_at":"2026-06-17T07:17:27Z","symbol":"NIM1321451","token_address":"0x48c641e442bdd824f70fe5f43b007932b009ed69","type":"artist","uuid":"77975fb1-b5f6-4301-a223-ba2429b145f7"}
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 0xe11bc0bbf7993ccecdce1fe2deecc4327f7077c6ca7f8cefb70d31060f8db158. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77975fb1-b5f6-4301-a223-ba2429b145f7.json and https://artists.proofprofile.net/proofs/artist/77975fb1-b5f6-4301-a223-ba2429b145f7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xe11bc0bbf7993ccecdce1fe2deecc4327f7077c6ca7f8cefb70d31060f8db158","name":"CV Biertje aan de Bar","registered_at":"2026-06-17T07:17:27Z","symbol":"NIM1321451","token_address":"0x48c641e442bdd824f70fe5f43b007932b009ed69","type":"artist","uuid":"77975fb1-b5f6-4301-a223-ba2429b145f7"}
album: Carnavalval
  type: MusicAlbum
  date published: 2024-10-11
  track: Carnavalval
    type: MusicRecording
    duration: PT2M42S
    duration ms: 162261
    explicit: false
    by artist: CV Biertje aan de Bar
    in album: Carnavalval
      type: MusicAlbum
      date published: 2024-10-11
    isrc code: NLKE82400054
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T03:45:14+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xa1129e7c7a1a26543a4829e81a831d71c66520d9262041bc8d27ee5329e640a5
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958959
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958959
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLKE82400054
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T03:51:22Z
    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 0xa1129e7c7a1a26543a4829e81a831d71c66520d9262041bc8d27ee5329e640a5. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/NLKE82400054.
      date published: 2026-07-21T03:51:22Z
    audio: Carnavalval
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 160.039
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.663
      additional property: Energy
        type: PropertyValue
        value: 0.806
      additional property: Speechiness
        type: PropertyValue
        value: 0.141
      additional property: Acousticness
        type: PropertyValue
        value: 0.131
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.003
      additional property: Liveness
        type: PropertyValue
        value: 0.04
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.832
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.06
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Biertje aan de barrrrrrr
  type: MusicAlbum
  date published: 2025-01-31