Difficult And Hard
type: MusicGroup
genre: hardcore
popularity: 9
followers: 423
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x91f77bfc64b59ba3c7c34059d59eac8499475c3d429761030f20d3d6bd0589bb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954124
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954124
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7bcaa3b2-c282-4a81-a9c3-452f8d741b69.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7bcaa3b2-c282-4a81-a9c3-452f8d741b69.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7bcaa3b2-c282-4a81-a9c3-452f8d741b69
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T18:22:18Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x91f77bfc64b59ba3c7c34059d59eac8499475c3d429761030f20d3d6bd0589bb","name":"Difficult And Hard","registered_at":"2026-06-17T08:38:52Z","symbol":"NIM1340832","token_address":"0x76c5c0b6730aaf82a842a64d9bdf63c2a015f919","type":"artist","uuid":"7bcaa3b2-c282-4a81-a9c3-452f8d741b69"}
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 0x91f77bfc64b59ba3c7c34059d59eac8499475c3d429761030f20d3d6bd0589bb. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7bcaa3b2-c282-4a81-a9c3-452f8d741b69.json and https://artists.proofprofile.net/proofs/artist/7bcaa3b2-c282-4a81-a9c3-452f8d741b69.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T19:19:19Z
  text: {"copyright_id":"0x91f77bfc64b59ba3c7c34059d59eac8499475c3d429761030f20d3d6bd0589bb","name":"Difficult And Hard","registered_at":"2026-06-17T08:38:52Z","symbol":"NIM1340832","token_address":"0x76c5c0b6730aaf82a842a64d9bdf63c2a015f919","type":"artist","uuid":"7bcaa3b2-c282-4a81-a9c3-452f8d741b69"}
album: The Endways of Undying
  type: MusicAlbum
  date published: 2016-01-31
  track: Our Mother
    type: MusicRecording
    duration: PT3M48S
    duration ms: 228780
    explicit: true
    by artist: Difficult And Hard
    in album: The Endways of Undying
      type: MusicAlbum
      date published: 2016-01-31
    genre: hardcore
    isrc code: DGA0H2310687
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T04:23:23+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x9e896bd03bc363ab0e731728078ded0c2b74ad44990a57df54797cf800d71ff5
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958969
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958969
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA0H2310687
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T04:58:13Z
    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 0x9e896bd03bc363ab0e731728078ded0c2b74ad44990a57df54797cf800d71ff5. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/DGA0H2310687.
      date published: 2026-07-21T04:58:13Z
    audio: Our Mother
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 137.833
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.222
      additional property: Energy
        type: PropertyValue
        value: 0.947
      additional property: Speechiness
        type: PropertyValue
        value: 0.243
      additional property: Acousticness
        type: PropertyValue
        value: 0.018
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.005
      additional property: Liveness
        type: PropertyValue
        value: 0.105
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.142
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.093
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: 335 Bullets
  type: MusicAlbum
  date published: 2024-10-29
album: Catastrophic
  type: MusicAlbum
  date published: 2025-03-10