Nube negra
type: MusicGroup
popularity: 2
followers: 4
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3c7d8bedf97b12346991a53a04a21a2ec29a937e398ff3afe9f380e032af76cb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954047
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954047
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/42649b65-abd0-4459-99f6-c6445398ab98.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/42649b65-abd0-4459-99f6-c6445398ab98.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/42649b65-abd0-4459-99f6-c6445398ab98
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T04:56:08Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3c7d8bedf97b12346991a53a04a21a2ec29a937e398ff3afe9f380e032af76cb","name":"Nube negra","registered_at":"2026-06-16T12:42:19Z","symbol":"NIM1055374","token_address":"0x599f6395a0fe9d6397833b7311482d625b1be34d","type":"artist","uuid":"42649b65-abd0-4459-99f6-c6445398ab98"}
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 0x3c7d8bedf97b12346991a53a04a21a2ec29a937e398ff3afe9f380e032af76cb. 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/42649b65-abd0-4459-99f6-c6445398ab98.json and https://artists.proofprofile.net/proofs/artist/42649b65-abd0-4459-99f6-c6445398ab98.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x3c7d8bedf97b12346991a53a04a21a2ec29a937e398ff3afe9f380e032af76cb","name":"Nube negra","registered_at":"2026-06-16T12:42:19Z","symbol":"NIM1055374","token_address":"0x599f6395a0fe9d6397833b7311482d625b1be34d","type":"artist","uuid":"42649b65-abd0-4459-99f6-c6445398ab98"}
album: La Creciente
  type: MusicAlbum
  date published: 2025-01-16
  track: La Creciente
    type: MusicRecording
    duration: PT2M43S
    duration ms: 163373
    explicit: false
    by artist: Nube negra
    in album: La Creciente
      type: MusicAlbum
      date published: 2025-01-16
    isrc code: US7VG2552598
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T03:26:27+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x6a17960b53991d5a74287b29efa155c49f64d9995f86ad5fae121238a4a5c4b5
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956889
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956889
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG2552598
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T06:56:49Z
    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 0x6a17960b53991d5a74287b29efa155c49f64d9995f86ad5fae121238a4a5c4b5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US7VG2552598.
      date published: 2026-07-06T06:56:49Z
    audio: La Creciente
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 155.955
      additional property: Musical Key
        type: PropertyValue
        value: 8
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.617
      additional property: Energy
        type: PropertyValue
        value: 0.788
      additional property: Speechiness
        type: PropertyValue
        value: 0.076
      additional property: Acousticness
        type: PropertyValue
        value: 0.157
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.064
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.953
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.405
      additional property: Key Name
        type: PropertyValue
        value: Ab
      additional property: Mode Name
        type: PropertyValue
        value: Major