Brass Calf
type: MusicGroup
genre: noise rock
popularity: 4
followers: 116
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8d089d133e9831c426ffb2d1b97819a4e75a78d31feb896824b888186d9faf17
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953943
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953943
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/219f02ca-ad70-43be-8a9d-a58b57d46232.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/219f02ca-ad70-43be-8a9d-a58b57d46232.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/219f02ca-ad70-43be-8a9d-a58b57d46232
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T11:59:32Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8d089d133e9831c426ffb2d1b97819a4e75a78d31feb896824b888186d9faf17","name":"Brass Calf","registered_at":"2026-06-16T01:15:16Z","symbol":"NIM0891342","token_address":"0x1c0c8229ac720756bc9958c9d2dc46e0af313466","type":"artist","uuid":"219f02ca-ad70-43be-8a9d-a58b57d46232"}
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 0x8d089d133e9831c426ffb2d1b97819a4e75a78d31feb896824b888186d9faf17. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/219f02ca-ad70-43be-8a9d-a58b57d46232.json and https://artists.proofprofile.net/proofs/artist/219f02ca-ad70-43be-8a9d-a58b57d46232.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T13:28:01Z
  text: {"copyright_id":"0x8d089d133e9831c426ffb2d1b97819a4e75a78d31feb896824b888186d9faf17","name":"Brass Calf","registered_at":"2026-06-16T01:15:16Z","symbol":"NIM0891342","token_address":"0x1c0c8229ac720756bc9958c9d2dc46e0af313466","type":"artist","uuid":"219f02ca-ad70-43be-8a9d-a58b57d46232"}
album: Disembodied Voice
  type: MusicAlbum
  date published: 2018-03-29
album: Delphi
  type: MusicAlbum
  date published: 2019-08-15
album: Crush
  type: MusicAlbum
  date published: 2020-03-13
album: Daily Grind
  type: MusicAlbum
  date published: 2022-01-21
album: Mutation
  type: MusicAlbum
  date published: 2022-04-29
album: lifeline
  type: MusicAlbum
  date published: 2022-12-30
album: too finite
  type: MusicAlbum
  date published: 2023-03-24
album: devotion
  type: MusicAlbum
  date published: 2023-07-07
album: Scheduled Day Off
  type: MusicAlbum
  date published: 2023-08-11
album: State of Mind
  type: MusicAlbum
  date published: 2024-08-20
album: Latchkey
  type: MusicAlbum
  date published: 2025-01-31
  track: Latchkey
    type: MusicRecording
    duration: PT4M2S
    duration ms: 242949
    explicit: false
    by artist: Brass Calf
    in album: Latchkey
      type: MusicAlbum
      date published: 2025-01-31
    genre: noise rock
    isrc code: QZDA72554375
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T19:16:43+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xd7766f79547ff6231425f5d6d0975565a718ed2b6631c6c3c5c0cc77551b0b84
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958601
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958601
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA72554375
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T19:27:02Z
    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 0xd7766f79547ff6231425f5d6d0975565a718ed2b6631c6c3c5c0cc77551b0b84. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDA72554375.
      date published: 2026-07-18T19:27:02Z
    audio: Latchkey
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 114.296
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.376
      additional property: Energy
        type: PropertyValue
        value: 0.57
      additional property: Speechiness
        type: PropertyValue
        value: 0.033
      additional property: Acousticness
        type: PropertyValue
        value: 0.004
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.677
      additional property: Liveness
        type: PropertyValue
        value: 0.182
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.286
      additional property: Loudness (dB)
        type: PropertyValue
        value: -8.429
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: The Boy
  type: MusicAlbum
  date published: 2025-05-02
album: Endless Patience
  type: MusicAlbum
  date published: 2025-05-06