Underground Heroes
type: MusicGroup
genre: indie punk
popularity: 5
followers: 1064
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8299b5eabf61c4dd64bebae9844fac2ae8123adda6a8b9e31aa39bd034af1703
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954587
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954587
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bbcd5e59-5938-4d94-8012-e75d0bc8f321.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bbcd5e59-5938-4d94-8012-e75d0bc8f321.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/bbcd5e59-5938-4d94-8012-e75d0bc8f321
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T19:10:41Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8299b5eabf61c4dd64bebae9844fac2ae8123adda6a8b9e31aa39bd034af1703","name":"Underground Heroes","registered_at":"2026-06-20T17:16:53Z","symbol":"NIM1663703","token_address":"0x8f1d666381c69ee46dd758f2b0b5747a6dcaf8c8","type":"artist","uuid":"bbcd5e59-5938-4d94-8012-e75d0bc8f321"}
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 0x8299b5eabf61c4dd64bebae9844fac2ae8123adda6a8b9e31aa39bd034af1703. Chain 2 (Bitcoin): anchored in block 954588 (2026-06-20T19:15:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bbcd5e59-5938-4d94-8012-e75d0bc8f321.json and https://artists.proofprofile.net/proofs/artist/bbcd5e59-5938-4d94-8012-e75d0bc8f321.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T19:15:05Z
  text: {"copyright_id":"0x8299b5eabf61c4dd64bebae9844fac2ae8123adda6a8b9e31aa39bd034af1703","name":"Underground Heroes","registered_at":"2026-06-20T17:16:53Z","symbol":"NIM1663703","token_address":"0x8f1d666381c69ee46dd758f2b0b5747a6dcaf8c8","type":"artist","uuid":"bbcd5e59-5938-4d94-8012-e75d0bc8f321"}
album: Estuary English
  type: MusicAlbum
  date published: 2012-05-23
  track: Skinny Twins
    type: MusicRecording
    duration: PT3M37S
    duration ms: 217773
    explicit: true
    by artist: Underground Heroes
    in album: Estuary English
      type: MusicAlbum
      date published: 2012-05-23
    genre: indie punk
    isrc code: TCACG1516342
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T05:00:55+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x03a2a9f80e9fab5f5d811fcc4279968c3899319cffd1d6eed51cd34b50ac6257
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958504
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958504
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACG1516342
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T05:41:32Z
    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 0x03a2a9f80e9fab5f5d811fcc4279968c3899319cffd1d6eed51cd34b50ac6257. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/TCACG1516342.
      date published: 2026-07-18T05:41:32Z
    audio: Skinny Twins
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 172.348
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.452
      additional property: Energy
        type: PropertyValue
        value: 0.93
      additional property: Speechiness
        type: PropertyValue
        value: 0.078
      additional property: Acousticness
        type: PropertyValue
        value: 0.089
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.127
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.898
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.701
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Estuary English
  type: MusicAlbum
  date published: 2012-07-01
album: Heroes
  type: MusicAlbum
  date published: 2013-03-31