Underground BD
type: MusicGroup
popularity: 2
followers: 6
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x214cd14c5c11693f9922b0bc5b1a3c2c3302d0671e02344e0142a516f3728759
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954693
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954693
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ea40a75d-5c62-4b96-9bde-50b79aa05e2f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ea40a75d-5c62-4b96-9bde-50b79aa05e2f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ea40a75d-5c62-4b96-9bde-50b79aa05e2f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T11:50:32Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x214cd14c5c11693f9922b0bc5b1a3c2c3302d0671e02344e0142a516f3728759","name":"Underground BD","registered_at":"2026-06-21T10:10:29Z","symbol":"NIM1895412","token_address":"0xa17bdac3218cf9fabf0feb4ade1fbb22dcca4c0d","type":"artist","uuid":"ea40a75d-5c62-4b96-9bde-50b79aa05e2f"}
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 0x214cd14c5c11693f9922b0bc5b1a3c2c3302d0671e02344e0142a516f3728759. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea40a75d-5c62-4b96-9bde-50b79aa05e2f.json and https://artists.proofprofile.net/proofs/artist/ea40a75d-5c62-4b96-9bde-50b79aa05e2f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T11:50:32Z
  text: {"copyright_id":"0x214cd14c5c11693f9922b0bc5b1a3c2c3302d0671e02344e0142a516f3728759","name":"Underground BD","registered_at":"2026-06-21T10:10:29Z","symbol":"NIM1895412","token_address":"0xa17bdac3218cf9fabf0feb4ade1fbb22dcca4c0d","type":"artist","uuid":"ea40a75d-5c62-4b96-9bde-50b79aa05e2f"}
album: Gajar Nouka
  type: MusicAlbum
  date published: 2022-12-17
  track: Gajar Nouka
    type: MusicRecording
    duration: PT3M52S
    duration ms: 232118
    explicit: false
    by artist: Underground BD
    in album: Gajar Nouka
      type: MusicAlbum
      date published: 2022-12-17
    isrc code: GX3Q92519905
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-22T09:49:06+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x35917273e8e4d585398014044750e2855f6f331db6b046e3becf40b8693bafbd
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959123
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959123
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX3Q92519905
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-22T11:35:32Z
    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 0x35917273e8e4d585398014044750e2855f6f331db6b046e3becf40b8693bafbd. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GX3Q92519905.
      date published: 2026-07-22T11:35:32Z
    audio: Gajar Nouka
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 79.645
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.535
      additional property: Energy
        type: PropertyValue
        value: 0.628
      additional property: Speechiness
        type: PropertyValue
        value: 0.05
      additional property: Acousticness
        type: PropertyValue
        value: 0.831
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.216
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.644
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.555
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Dekha Tenu Pehli Pehli
  type: MusicAlbum
  date published: 2025-03-04
album: Bi Sahara (Bi Illi)
  type: MusicAlbum
  date published: 2025-03-07
album: Andho Kore Dao
  type: MusicAlbum
  date published: 2025-03-11
album: Kaberi
  type: MusicAlbum
  date published: 2025-03-11