Zard
type: MusicGroup
description: (stylized as ZARD) were a Japanese pop rock group, originally with five members, with lead vocalist Izumi Sakai as its only constant member. Izumi Sakai was also the band's core member. Zard's work w
popularity: 3
followers: 213
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSProofURL
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additional property: OTSRecordURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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  value: 2026-06-16T20:07:57Z
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 0x153e34ce065b807fb9a624983d7fd1ad3feb7f1a25216a5dd1bfc435dd3f0011. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2bfa5c8f-df3b-4f2a-bcae-c6b22e471a0f.json and https://artists.proofprofile.net/proofs/artist/2bfa5c8f-df3b-4f2a-bcae-c6b22e471a0f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
album: NON STOP
  type: MusicAlbum
  date published: 2022-01-15
album: UNFAIR
  type: MusicAlbum
  date published: 2022-02-11
album: TALK SHOW
  type: MusicAlbum
  date published: 2022-03-27
album: MAMBA
  type: MusicAlbum
  date published: 2022-12-24
album: LATHOS
  type: MusicAlbum
  date published: 2023-07-02
album: 7/7
  type: MusicAlbum
  date published: 2024-03-26
album: VENZINI
  type: MusicAlbum
  date published: 2024-09-26
album: TIGKA
  type: MusicAlbum
  date published: 2025-01-07
album: STRUGGLE
  type: MusicAlbum
  date published: 2025-02-04
album: NRTD
  type: MusicAlbum
  date published: 2025-04-10
  track: NRTD
    type: MusicRecording
    duration: PT2M38S
    duration ms: 158823
    explicit: true
    by artist: Zard
    in album: NRTD
      type: MusicAlbum
      date published: 2025-04-10
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    additional property: CopyrightStatus
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    additional property: OTSBitcoinBlockVerifyURL
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    additional property: OTSVerificationAPI
      type: PropertyValue
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T02:58:58Z
    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 0xae484e69372a9b28e87ff0cdddc468180070227db20f28bd00e558c49d5a4318. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZK6G2534877.
      date published: 2026-07-18T02:58:58Z
    audio: NRTD
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 136.039
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.854
      additional property: Energy
        type: PropertyValue
        value: 0.816
      additional property: Speechiness
        type: PropertyValue
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      additional property: Acousticness
        type: PropertyValue
        value: 0.077
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.087
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.473
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.727
      additional property: Key Name
        type: PropertyValue
        value: Bb
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: TIGKA
  type: MusicAlbum
  date published: 2025-07-06