Black Mastiff
type: MusicGroup
genre: doom metal
genre: sludge metal
genre: space rock
genre: stoner rock
popularity: 5
followers: 1701
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4c9d3ee369074f466b318b9919f085e6e68c355b234d728fd3d8433988f8836c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/75796ae2-c8e1-407f-a763-cedaa0df039a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/75796ae2-c8e1-407f-a763-cedaa0df039a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/75796ae2-c8e1-407f-a763-cedaa0df039a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4c9d3ee369074f466b318b9919f085e6e68c355b234d728fd3d8433988f8836c","name":"Black Mastiff","registered_at":"2026-06-17T06:35:44Z","symbol":"NIM1311503","token_address":"0x95201b940d585ec1e0b5de374d19210e575637ed","type":"artist","uuid":"75796ae2-c8e1-407f-a763-cedaa0df039a"}
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 0x4c9d3ee369074f466b318b9919f085e6e68c355b234d728fd3d8433988f8836c. 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/75796ae2-c8e1-407f-a763-cedaa0df039a.json and https://artists.proofprofile.net/proofs/artist/75796ae2-c8e1-407f-a763-cedaa0df039a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x4c9d3ee369074f466b318b9919f085e6e68c355b234d728fd3d8433988f8836c","name":"Black Mastiff","registered_at":"2026-06-17T06:35:44Z","symbol":"NIM1311503","token_address":"0x95201b940d585ec1e0b5de374d19210e575637ed","type":"artist","uuid":"75796ae2-c8e1-407f-a763-cedaa0df039a"}
album: S/T
  type: MusicAlbum
  date published: 2011-01-01
album: Pyramids
  type: MusicAlbum
  date published: 2012-03-01
album: Pyramids
  type: MusicAlbum
  date published: 2012-03-01
album: Pyramids
  type: MusicAlbum
  date published: 2012-03-01
album: Pyramids
  type: MusicAlbum
  date published: 2012-03-01
  track: Rolling Stoned
    type: MusicRecording
    duration: PT3M50S
    duration ms: 230506
    explicit: false
    by artist: Black Mastiff
    in album: Pyramids
      type: MusicAlbum
      date published: 2012-03-01
    genre: doom metal
    genre: sludge metal
    genre: space rock
    genre: stoner rock
    isrc code: USA2P1216160
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T02:07:41+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x3d56f6538e98a09df6dab47e465d3ab2ec450f31903553df9fa70ac366e4ba88
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958955
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958955
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P1216160
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T03:03:40Z
    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 0x3d56f6538e98a09df6dab47e465d3ab2ec450f31903553df9fa70ac366e4ba88. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USA2P1216160.
      date published: 2026-07-21T03:03:40Z
    audio: Rolling Stoned
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 178.2
      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: 0.512
      additional property: Energy
        type: PropertyValue
        value: 0.814
      additional property: Speechiness
        type: PropertyValue
        value: 0.04
      additional property: Acousticness
        type: PropertyValue
        value: 0.079
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.168
      additional property: Liveness
        type: PropertyValue
        value: 0.257
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.854
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.936
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Black Mastiff
  type: MusicAlbum
  date published: 2014-10-15
album: Black Mastiff
  type: MusicAlbum
  date published: 2014-10-15
album: Black Mastiff
  type: MusicAlbum
  date published: 2014-10-21
album: Black Mastiff
  type: MusicAlbum
  date published: 2014-10-21
album: Near North
  type: MusicAlbum
  date published: 2015-08-28
album: Music Machine
  type: MusicAlbum
  date published: 2015-10-09
album: Music Machine
  type: MusicAlbum
  date published: 2015-10-09
album: Music Machine
  type: MusicAlbum
  date published: 2015-10-09
album: Music Machine
  type: MusicAlbum
  date published: 2015-10-09
album: Black Mastiff
  type: MusicAlbum
  date published: 2015-10-15
album: Loser Delusions
  type: MusicAlbum
  date published: 2019-10-18