The Leopards
type: MusicGroup
genre: psychobilly
genre: rockabilly
popularity: 5
followers: 937
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa6f1cc21af91fb08341920ce3e37e95c8678ae221786152afddc953f55909828
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954717
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954717
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f3848d23-2121-4f99-8689-440f2890a9e7.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f3848d23-2121-4f99-8689-440f2890a9e7.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f3848d23-2121-4f99-8689-440f2890a9e7
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T15:47:51Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa6f1cc21af91fb08341920ce3e37e95c8678ae221786152afddc953f55909828","name":"The Leopards","registered_at":"2026-06-21T14:15:52Z","symbol":"NIM1944327","token_address":"0x2cbd11cd8e13733a45371b3075eb06e1918df432","type":"artist","uuid":"f3848d23-2121-4f99-8689-440f2890a9e7"}
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 0xa6f1cc21af91fb08341920ce3e37e95c8678ae221786152afddc953f55909828. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3848d23-2121-4f99-8689-440f2890a9e7.json and https://artists.proofprofile.net/proofs/artist/f3848d23-2121-4f99-8689-440f2890a9e7.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-21T15:47:51Z
  text: {"copyright_id":"0xa6f1cc21af91fb08341920ce3e37e95c8678ae221786152afddc953f55909828","name":"The Leopards","registered_at":"2026-06-21T14:15:52Z","symbol":"NIM1944327","token_address":"0x2cbd11cd8e13733a45371b3075eb06e1918df432","type":"artist","uuid":"f3848d23-2121-4f99-8689-440f2890a9e7"}
album: Down That Line
  type: MusicAlbum
  date published: 2014-05-20
  track: Down That Line
    type: MusicRecording
    duration: PT2M59S
    duration ms: 179018
    explicit: false
    by artist: The Leopards
    in album: Down That Line
      type: MusicAlbum
      date published: 2014-05-20
    genre: psychobilly
    genre: rockabilly
    isrc code: USHM21420840
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T09:23:53+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x1bdf094ed2bb103b0ec6b972dea6a107fd3992414383df4cc67666e44d3bb9c9
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956545
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956545
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21420840
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T19:59:51Z
    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 0x1bdf094ed2bb103b0ec6b972dea6a107fd3992414383df4cc67666e44d3bb9c9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21420840 — a six-check JSON result.
      date published: 2026-07-03T19:59:51Z
    audio: Down That Line
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 106.137
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.496
      additional property: Energy
        type: PropertyValue
        value: 0.819
      additional property: Speechiness
        type: PropertyValue
        value: 0.027
      additional property: Acousticness
        type: PropertyValue
        value: 0
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.001
      additional property: Liveness
        type: PropertyValue
        value: 0.36
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.664
      additional property: Loudness (dB)
        type: PropertyValue
        value: -13.173
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Temptation
  type: MusicAlbum
  date published: 2015-04-01
album: You've Got the Love
  type: MusicAlbum
  date published: 2025-06-16