The Sweet Heart Singers
type: MusicGroup
popularity: 5
followers: 3
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe641f587b552a942ff17cd8b0553d8ccca19153679cad07cd446e62091531dbf
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/8d2b2ba8-b8af-41f2-8700-d009b6609946.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8d2b2ba8-b8af-41f2-8700-d009b6609946.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/8d2b2ba8-b8af-41f2-8700-d009b6609946
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe641f587b552a942ff17cd8b0553d8ccca19153679cad07cd446e62091531dbf","name":"The Sweet Heart Singers","registered_at":"2026-06-17T15:17:39Z","symbol":"NIM1435868","token_address":"0x887fdfde005ebbfa60bc37e445043eed0ba44882","type":"artist","uuid":"8d2b2ba8-b8af-41f2-8700-d009b6609946"}
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 0xe641f587b552a942ff17cd8b0553d8ccca19153679cad07cd446e62091531dbf. 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/8d2b2ba8-b8af-41f2-8700-d009b6609946.json and https://artists.proofprofile.net/proofs/artist/8d2b2ba8-b8af-41f2-8700-d009b6609946.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0xe641f587b552a942ff17cd8b0553d8ccca19153679cad07cd446e62091531dbf","name":"The Sweet Heart Singers","registered_at":"2026-06-17T15:17:39Z","symbol":"NIM1435868","token_address":"0x887fdfde005ebbfa60bc37e445043eed0ba44882","type":"artist","uuid":"8d2b2ba8-b8af-41f2-8700-d009b6609946"}
album: Beautiful Lullabies for Beautiful Children
  type: MusicAlbum
  date published: 2025-02-15
  track: Time for Nighty Night
    type: MusicRecording
    duration: PT3M7S
    duration ms: 187559
    explicit: false
    by artist: The Sweet Heart Singers
    in album: Beautiful Lullabies for Beautiful Children
      type: MusicAlbum
      date published: 2025-02-15
    isrc code: QZHN32536743
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T07:49:07+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xbda0d777fe0ca1308cbefc60aad576ec9b576435fe1056f52049089037984d47
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958846
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958846
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN32536743
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T10:51:06Z
    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 0xbda0d777fe0ca1308cbefc60aad576ec9b576435fe1056f52049089037984d47. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:51:06Z), 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/QZHN32536743.
      date published: 2026-07-20T10:51:06Z
    audio: Time for Nighty Night
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 98.056
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.575
      additional property: Energy
        type: PropertyValue
        value: 0.156
      additional property: Speechiness
        type: PropertyValue
        value: 0.028
      additional property: Acousticness
        type: PropertyValue
        value: 0.787
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.092
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.494
      additional property: Loudness (dB)
        type: PropertyValue
        value: -15.44
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Let's play!
  type: MusicAlbum
  date published: 2025-02-22