139th Street Quartet
type: MusicGroup
popularity: 9
followers: 432
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2074c1f4888d2eb683d9e70b46d5ab5bbfd2028171cdb33018760d111e363a10
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/893f6f40-8bf8-4489-adf3-74b715f44963.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/893f6f40-8bf8-4489-adf3-74b715f44963.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/893f6f40-8bf8-4489-adf3-74b715f44963
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2074c1f4888d2eb683d9e70b46d5ab5bbfd2028171cdb33018760d111e363a10","name":"139th Street Quartet","registered_at":"2026-06-17T13:32:35Z","symbol":"NIM1410791","token_address":"0xb0a71ed730d586dad1d9f81dcb91c9e1a95177a3","type":"artist","uuid":"893f6f40-8bf8-4489-adf3-74b715f44963"}
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 0x2074c1f4888d2eb683d9e70b46d5ab5bbfd2028171cdb33018760d111e363a10. 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/893f6f40-8bf8-4489-adf3-74b715f44963.json and https://artists.proofprofile.net/proofs/artist/893f6f40-8bf8-4489-adf3-74b715f44963.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0x2074c1f4888d2eb683d9e70b46d5ab5bbfd2028171cdb33018760d111e363a10","name":"139th Street Quartet","registered_at":"2026-06-17T13:32:35Z","symbol":"NIM1410791","token_address":"0xb0a71ed730d586dad1d9f81dcb91c9e1a95177a3","type":"artist","uuid":"893f6f40-8bf8-4489-adf3-74b715f44963"}
album: Collection - Volume 4
  type: MusicAlbum
  date published: 2008-10-14
album: Collection - Volume 1
  type: MusicAlbum
  date published: 2008-10-14
  track: Bowery Medley
    type: MusicRecording
    duration: PT3M2S
    duration ms: 182760
    explicit: false
    by artist: 139th Street Quartet
    in album: Collection - Volume 1
      type: MusicAlbum
      date published: 2008-10-14
    isrc code: US29H0811565
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T20:12:51+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x43a70e4f03dfedf239c885bd6d25eeb8de2a4cde6c272361283d2ff3244ee6ee
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959058
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959058
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US29H0811565
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T21:09:36Z
    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 0x43a70e4f03dfedf239c885bd6d25eeb8de2a4cde6c272361283d2ff3244ee6ee. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/US29H0811565.
      date published: 2026-07-21T21:09:36Z
    audio: Bowery Medley
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 129.207
      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: 0.61
      additional property: Energy
        type: PropertyValue
        value: 0.182
      additional property: Speechiness
        type: PropertyValue
        value: 0.101
      additional property: Acousticness
        type: PropertyValue
        value: 0.977
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.194
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.451
      additional property: Loudness (dB)
        type: PropertyValue
        value: -12.39
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Collection - Volume 6
  type: MusicAlbum
  date published: 2008-10-14
album: Collection - Volume 5
  type: MusicAlbum
  date published: 2008-10-14
album: Collection - Volume 3
  type: MusicAlbum
  date published: 2008-10-14
album: Collection - Volume 2
  type: MusicAlbum
  date published: 2008-10-14