The 11Th Hour
type: MusicGroup
genre: doom metal
genre: gothic metal
genre: sludge metal
popularity: 5
followers: 1983
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x57e6b85dd7779f2766731767a750444ec901dcd5682dbd533fb58c87fa891766
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8f6be111-0934-4ce8-8a58-3d65214ccaad.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8f6be111-0934-4ce8-8a58-3d65214ccaad.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/8f6be111-0934-4ce8-8a58-3d65214ccaad
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x57e6b85dd7779f2766731767a750444ec901dcd5682dbd533fb58c87fa891766","name":"The 11Th Hour","registered_at":"2026-06-17T15:38:45Z","symbol":"NIM1440917","token_address":"0xcf4287165d3af604a9d84cbc779e79321f1d20cb","type":"artist","uuid":"8f6be111-0934-4ce8-8a58-3d65214ccaad"}
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 0x57e6b85dd7779f2766731767a750444ec901dcd5682dbd533fb58c87fa891766. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f6be111-0934-4ce8-8a58-3d65214ccaad.json and https://artists.proofprofile.net/proofs/artist/8f6be111-0934-4ce8-8a58-3d65214ccaad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0x57e6b85dd7779f2766731767a750444ec901dcd5682dbd533fb58c87fa891766","name":"The 11Th Hour","registered_at":"2026-06-17T15:38:45Z","symbol":"NIM1440917","token_address":"0xcf4287165d3af604a9d84cbc779e79321f1d20cb","type":"artist","uuid":"8f6be111-0934-4ce8-8a58-3d65214ccaad"}
album: Burden of Grief
  type: MusicAlbum
  date published: 2009
  track: One Last Smoke
    type: MusicRecording
    duration: PT6M43S
    duration ms: 403893
    explicit: false
    by artist: The 11Th Hour
    in album: Burden of Grief
      type: MusicAlbum
      date published: 2009
    genre: doom metal
    genre: gothic metal
    genre: sludge metal
    isrc code: ATN260931201
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T20:30:22+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x0e07a4a4bf968989fbc6aabf3d88e0c95a5fab93c771c23231249248f40a6374
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958931
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958931
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATN260931201
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T21:15:01Z
    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 0x0e07a4a4bf968989fbc6aabf3d88e0c95a5fab93c771c23231249248f40a6374. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ATN260931201.
      date published: 2026-07-20T21:15:01Z
    audio: One Last Smoke
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 94.659
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.316
      additional property: Energy
        type: PropertyValue
        value: 0.697
      additional property: Speechiness
        type: PropertyValue
        value: 0.065
      additional property: Acousticness
        type: PropertyValue
        value: 0.001
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.174
      additional property: Liveness
        type: PropertyValue
        value: 0.514
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.105
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.32
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Burden Of Grief
  type: MusicAlbum
  date published: 2009
album: Burden Of Grief
  type: MusicAlbum
  date published: 2009-01-01
album: Burden of Grief
  type: MusicAlbum
  date published: 2009-08-20
album: Burden of Grief
  type: MusicAlbum
  date published: 2009-08-20
album: Burden of Grief
  type: MusicAlbum
  date published: 2009-11-03
album: Lacrima Mortis
  type: MusicAlbum
  date published: 2012-01-01
album: Lacrima Mortis (2-Track Promo Version)
  type: MusicAlbum
  date published: 2012-01-27
album: Lacrima Mortis
  type: MusicAlbum
  date published: 2012-01-27
album: Lacrima Mortis
  type: MusicAlbum
  date published: 2012-01-27
album: Lacrima Mortis
  type: MusicAlbum
  date published: 2012-02-07
album: Lacrima Mortis
  type: MusicAlbum
  date published: 2013-08-01