HMH
type: MusicGroup
popularity: 8
followers: 729
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd002a8fc9cfbf4064ce2ecf1fe5ff427a877494cf3fe5480427c7652cd83277d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bf3d0cfe-b202-4de1-bc8b-e2cf2b55e1f4.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bf3d0cfe-b202-4de1-bc8b-e2cf2b55e1f4.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/bf3d0cfe-b202-4de1-bc8b-e2cf2b55e1f4
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
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 0xd002a8fc9cfbf4064ce2ecf1fe5ff427a877494cf3fe5480427c7652cd83277d. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf3d0cfe-b202-4de1-bc8b-e2cf2b55e1f4.json and https://artists.proofprofile.net/proofs/artist/bf3d0cfe-b202-4de1-bc8b-e2cf2b55e1f4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
album: Stick Around
  type: MusicAlbum
  date published: 2021-03-12
album: Sunset
  type: MusicAlbum
  date published: 2021-04-02
album: Thinking About You
  type: MusicAlbum
  date published: 2021-06-25
album: Count on You
  type: MusicAlbum
  date published: 2021-07-02
album: Cover It Up
  type: MusicAlbum
  date published: 2021-07-23
album: Cover It Up
  type: MusicAlbum
  date published: 2021-07-23
album: 4A.M
  type: MusicAlbum
  date published: 2021-11-26
  track: 4A.M
    type: MusicRecording
    duration: PT2M25S
    duration ms: 145600
    explicit: false
    by artist: HMH
    in album: 4A.M
      type: MusicAlbum
      date published: 2021-11-26
    isrc code: ATEK02177322
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T23:17:12+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xc54caed8222eb541c6a24976ed3fef634b6132a755b5532520a03f922307f9eb
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958342
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958342
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATEK02177322
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T02:21:25Z
    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 0xc54caed8222eb541c6a24976ed3fef634b6132a755b5532520a03f922307f9eb. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:21:25Z), 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/ATEK02177322.
      date published: 2026-07-17T02:21:25Z
    audio: 4A.M
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 77.515
      additional property: Musical Key
        type: PropertyValue
        value: 6
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.504
      additional property: Energy
        type: PropertyValue
        value: 0.555
      additional property: Speechiness
        type: PropertyValue
        value: 0.449
      additional property: Acousticness
        type: PropertyValue
        value: 0.367
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.34
      additional property: Liveness
        type: PropertyValue
        value: 0.356
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.038
      additional property: Loudness (dB)
        type: PropertyValue
        value: -12.06
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Let Me Show You
  type: MusicAlbum
  date published: 2022-08-26
album: Never Be the Same
  type: MusicAlbum
  date published: 2022-09-16
album: Ask You
  type: MusicAlbum
  date published: 2022-10-07
album: Say My Name
  type: MusicAlbum
  date published: 2024-02-09