Extra Ball
type: MusicGroup
genre: jazz fusion
popularity: 6
followers: 1156
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa475e0905aaa0a4ef19e7904cbc3726f238d6e1504eb478fe697f60bfbe7d406
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/812b7b66-414c-4ac2-9bc5-01402f3fa77f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/812b7b66-414c-4ac2-9bc5-01402f3fa77f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/812b7b66-414c-4ac2-9bc5-01402f3fa77f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa475e0905aaa0a4ef19e7904cbc3726f238d6e1504eb478fe697f60bfbe7d406","name":"Extra Ball","registered_at":"2026-06-17T10:35:36Z","symbol":"NIM1368672","token_address":"0x67aff931d3984036e62634b861a1dad1f77bc6b7","type":"artist","uuid":"812b7b66-414c-4ac2-9bc5-01402f3fa77f"}
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 0xa475e0905aaa0a4ef19e7904cbc3726f238d6e1504eb478fe697f60bfbe7d406. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/812b7b66-414c-4ac2-9bc5-01402f3fa77f.json and https://artists.proofprofile.net/proofs/artist/812b7b66-414c-4ac2-9bc5-01402f3fa77f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0xa475e0905aaa0a4ef19e7904cbc3726f238d6e1504eb478fe697f60bfbe7d406","name":"Extra Ball","registered_at":"2026-06-17T10:35:36Z","symbol":"NIM1368672","token_address":"0x67aff931d3984036e62634b861a1dad1f77bc6b7","type":"artist","uuid":"812b7b66-414c-4ac2-9bc5-01402f3fa77f"}
album: Birthday (Polish Jazz)
  type: MusicAlbum
  date published: 1976
  track: Taniec Maryny
    type: MusicRecording
    duration: PT3M34S
    duration ms: 214626
    explicit: false
    by artist: Extra Ball
    in album: Birthday (Polish Jazz)
      type: MusicAlbum
      date published: 1976
    genre: jazz fusion
    isrc code: PLA247620385
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T00:28:52+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x0ec38d95df2f5c24c1534dfa654a0a4ae447d1592d0b8c9e9f3fc55585e5f02c
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958947
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958947
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLA247620385
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T00:53:33Z
    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 0x0ec38d95df2f5c24c1534dfa654a0a4ae447d1592d0b8c9e9f3fc55585e5f02c. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/PLA247620385.
      date published: 2026-07-21T00:53:33Z
    audio: Taniec Maryny
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 102.285
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.555
      additional property: Energy
        type: PropertyValue
        value: 0.479
      additional property: Speechiness
        type: PropertyValue
        value: 0.032
      additional property: Acousticness
        type: PropertyValue
        value: 0.447
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.888
      additional property: Liveness
        type: PropertyValue
        value: 0.087
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.96
      additional property: Loudness (dB)
        type: PropertyValue
        value: -16.595
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Go Ahead (Polish Jazz vol. 59)
  type: MusicAlbum
  date published: 1979-10-26
album: Akumula-torres (Live)
  type: MusicAlbum
  date published: 1983-12-11
album: Aquarium live, Vol. 3 (Live)
  type: MusicAlbum
  date published: 2009-12-31