Heartline
type: MusicGroup
genre: djent
genre: metalcore
description: "Heartline" is a song by British singer Craig David. It was written by David, Jonas Blue, and Sam Romans and produced by Blue for his seventh studio album, The Time Is Now (2018). The song was release
popularity: 12
followers: 2663
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  value: 2026-06-14T05:36:59Z
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additional property: OTSVerifyInstructions
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  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
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  date published: 2026-06-14T05:36:59Z
album: Frail
  type: MusicAlbum
  date published: 2019-02-12
album: Covert
  type: MusicAlbum
  date published: 2019-06-23
album: Essence
  type: MusicAlbum
  date published: 2019-09-13
album: Crystal Eyes
  type: MusicAlbum
  date published: 2019-12-20
album: as the crow flies
  type: MusicAlbum
  date published: 2021-02-26
album: under the willow
  type: MusicAlbum
  date published: 2021-03-19
album: i call for the sinking warmth
  type: MusicAlbum
  date published: 2021-03-26
album: DELOREAN
  type: MusicAlbum
  date published: 2022-07-22
album: Somewhere Else [I]
  type: MusicAlbum
  date published: 2023-05-19
album: Lovers
  type: MusicAlbum
  date published: 2024-05-23
  track: Lovers
    type: MusicRecording
    duration: PT3M24S
    duration ms: 204546
    explicit: false
    by artist: Heartline
    in album: Lovers
      type: MusicAlbum
      date published: 2024-05-23
    genre: djent
    genre: metalcore
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    additional property: OTSVerifyInstructions
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      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
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733e5d891cb1e668823bf7505046d7f5101caa381125f6c142b037bc24936ae7. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:54:04Z), 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/AUMEV2452344.
      date published: 2026-07-17T04:54:04Z
    audio: Lovers
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 118.009
      additional property: Musical Key
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      additional property: Danceability
        type: PropertyValue
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      additional property: Energy
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      additional property: Speechiness
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      additional property: Acousticness
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      additional property: Instrumentalness
        type: PropertyValue
        value: 0.568
      additional property: Liveness
        type: PropertyValue
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      additional property: Valence (Positivity)
        type: PropertyValue
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      additional property: Loudness (dB)
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        value: -6.173
      additional property: Key Name
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        value: F#
      additional property: Mode Name
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album: Pink Lemonade
  type: MusicAlbum
  date published: 2024-07-03
  track: Pink Lemonade
    type: MusicRecording
    duration: PT3M27S
    duration ms: 207992
    explicit: false
    by artist: Heartline
    in album: Pink Lemonade
      type: MusicAlbum
      date published: 2024-07-03
    genre: djent
    genre: metalcore
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    additional property: OTSVerifyInstructions
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      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
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679888615eb5a42f86e7f5c9ba94344d889a9fe9e22297c689830ae5093a268d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/AUMEV2475052.
      date published: 2026-07-19T15:48:23Z
    audio: Pink Lemonade
      type: AudioObject
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album: Synthetic
album: Dead Batteries

Tempo (BPM)
type: PropertyValue
value: 141.972

Musical Key
type: PropertyValue
value: 6

Mode (Major/Minor)
type: PropertyValue
value: 0

Time Signature
type: PropertyValue
value: 4

Danceability
type: PropertyValue
value: 0.503

Energy
type: PropertyValue
value: 0.904

Speechiness
type: PropertyValue
value: 0.057

Acousticness
type: PropertyValue
value: 0.002

Instrumentalness
type: PropertyValue
value: 0.007

Liveness
type: PropertyValue
value: 0.183

Valence (Positivity)
type: PropertyValue
value: 0.483

Loudness (dB)
type: PropertyValue
value: -6.643

Key Name
type: PropertyValue
value: F#

Mode Name
type: PropertyValue
value: Minor

Synthetic
type: MusicAlbum
date published: 2024-08-01

Pink Lemonade
type: MusicAlbum
date published: 2024-08-16
track: Akimbo
  type: MusicRecording
  duration: PT3M3S
  duration ms: 183797
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  by artist: Heartline
  in album: Pink Lemonade
    type: MusicAlbum
    date published: 2024-08-16
  genre: djent
  genre: metalcore
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    value: 2026-07-20T05:08:22Z
  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
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    date published: 2026-07-20T05:08:22Z
  audio: Akimbo
    type: AudioObject
    additional property: Tempo (BPM)
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      value: 167.062
    additional property: Musical Key
      type: PropertyValue
      value: 4
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.364
    additional property: Energy
      type: PropertyValue
      value: 0.914
    additional property: Speechiness
      type: PropertyValue
      value: 0.06
    additional property: Acousticness
      type: PropertyValue
      value: 0
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.024
    additional property: Liveness
      type: PropertyValue
      value: 0.392
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.475
    additional property: Loudness (dB)
      type: PropertyValue
      value: -5.477
    additional property: Key Name
      type: PropertyValue
      value: E
    additional property: Mode Name
      type: PropertyValue
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Dead Batteries
type: MusicAlbum
date published: 2025-09-17