Martina Barta
type: MusicGroup
popularity: 5
followers: 810
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf185735ec3a55ecf9a4290982c4ec3d6cb0cb54ff4077fe688488d889059ccfd
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/5bb4c112-60a1-4bfd-a7fe-83c053968eb1.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5bb4c112-60a1-4bfd-a7fe-83c053968eb1.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5bb4c112-60a1-4bfd-a7fe-83c053968eb1
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf185735ec3a55ecf9a4290982c4ec3d6cb0cb54ff4077fe688488d889059ccfd","name":"Martina Barta","registered_at":"2026-06-16T21:34:45Z","symbol":"NIM1182415","token_address":"0x403b753bf30eb07984a1b4f04e27e1f0fb8b2091","type":"artist","uuid":"5bb4c112-60a1-4bfd-a7fe-83c053968eb1"}
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 0xf185735ec3a55ecf9a4290982c4ec3d6cb0cb54ff4077fe688488d889059ccfd. 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/5bb4c112-60a1-4bfd-a7fe-83c053968eb1.json and https://artists.proofprofile.net/proofs/artist/5bb4c112-60a1-4bfd-a7fe-83c053968eb1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xf185735ec3a55ecf9a4290982c4ec3d6cb0cb54ff4077fe688488d889059ccfd","name":"Martina Barta","registered_at":"2026-06-16T21:34:45Z","symbol":"NIM1182415","token_address":"0x403b753bf30eb07984a1b4f04e27e1f0fb8b2091","type":"artist","uuid":"5bb4c112-60a1-4bfd-a7fe-83c053968eb1"}
album: My Turn
  type: MusicAlbum
  date published: 2017-03-29
album: My Turn
  type: MusicAlbum
  date published: 2017-03-29
  track: My Turn
    type: MusicRecording
    duration: PT2M58S
    duration ms: 178777
    explicit: false
    by artist: Martina Barta
    in album: My Turn
      type: MusicAlbum
      date published: 2017-03-29
    isrc code: CZM021700003
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T08:08:03+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x23661efd42e7ee2fdae3607d69c7b49752f1121fa96863c12d555a1b7167954a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958263
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958263
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZM021700003
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T08:19:47Z
    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 0x23661efd42e7ee2fdae3607d69c7b49752f1121fa96863c12d555a1b7167954a. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/CZM021700003.
      date published: 2026-07-16T08:19:47Z
    audio: My Turn
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 86.347
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.362
      additional property: Energy
        type: PropertyValue
        value: 0.423
      additional property: Speechiness
        type: PropertyValue
        value: 0.037
      additional property: Acousticness
        type: PropertyValue
        value: 0.435
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.312
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.161
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.082
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: My Turn (Karaoke Version)
  type: MusicAlbum
  date published: 2017-04-08
album: My Turn (JOWST Remix)
  type: MusicAlbum
  date published: 2017-09-25
album: What a Wonderful World
  type: MusicAlbum
  date published: 2020-07-17