THE HOLDENS
type: MusicGroup
genre: japanese indie
popularity: 11
followers: 1968
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xed1a0bc4f424ccc792c4988e78d10b22ea2511969e2b62493d63fb30db661e0d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953678
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953678
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/63593980-8c5c-41e5-b091-a9dc9c3f5018.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/63593980-8c5c-41e5-b091-a9dc9c3f5018.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/63593980-8c5c-41e5-b091-a9dc9c3f5018
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T19:23:11Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xed1a0bc4f424ccc792c4988e78d10b22ea2511969e2b62493d63fb30db661e0d","name":"THE HOLDENS","registered_at":"2026-06-14T14:57:15Z","symbol":"NIM0488533","token_address":"0xa6714da963a1f3351ae9605f20598801e121a037","type":"artist","uuid":"63593980-8c5c-41e5-b091-a9dc9c3f5018"}
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 0xed1a0bc4f424ccc792c4988e78d10b22ea2511969e2b62493d63fb30db661e0d. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63593980-8c5c-41e5-b091-a9dc9c3f5018.json and https://artists.proofprofile.net/proofs/artist/63593980-8c5c-41e5-b091-a9dc9c3f5018.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T19:23:11Z
  text: {"copyright_id":"0xed1a0bc4f424ccc792c4988e78d10b22ea2511969e2b62493d63fb30db661e0d","name":"THE HOLDENS","registered_at":"2026-06-14T14:57:15Z","symbol":"NIM0488533","token_address":"0xa6714da963a1f3351ae9605f20598801e121a037","type":"artist","uuid":"63593980-8c5c-41e5-b091-a9dc9c3f5018"}
album: NAGISA
  type: MusicAlbum
  date published: 2020-11-23
album: ぼやけ
  type: MusicAlbum
  date published: 2023-01-25
album: Sparks
  type: MusicAlbum
  date published: 2024-09-25
album: きらきら
  type: MusicAlbum
  date published: 2024-09-25
album: RAIMUGI
  type: MusicAlbum
  date published: 2024-10-23
album: RAIMUGI
  type: MusicAlbum
  date published: 2024-10-23
  track: できたら
    type: MusicRecording
    duration: PT3M25S
    duration ms: 205632
    explicit: false
    by artist: THE HOLDENS
    in album: RAIMUGI
      type: MusicAlbum
      date published: 2024-10-23
    genre: japanese indie
    isrc code: TCJPB2486199
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T17:26:32+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x7cec1a0f5c3edcdb331a2f04b87d4d7140522469a0fa054a603ee06bdc8a2357
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958594
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958594
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPB2486199
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T18:05:01Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cec1a0f5c3edcdb331a2f04b87d4d7140522469a0fa054a603ee06bdc8a2357. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCJPB2486199.
      date published: 2026-07-18T18:05:01Z
    audio: できたら
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 179.905
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.416
      additional property: Energy
        type: PropertyValue
        value: 0.731
      additional property: Speechiness
        type: PropertyValue
        value: 0.057
      additional property: Acousticness
        type: PropertyValue
        value: 0.018
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.003
      additional property: Liveness
        type: PropertyValue
        value: 0.135
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.842
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.169
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
  track: キャビン・フレーバー
    type: MusicRecording
    duration: PT1M50S
    duration ms: 110351
    explicit: false
    by artist: THE HOLDENS
    in album: RAIMUGI
      type: MusicAlbum
      date published: 2024-10-23
    genre: japanese indie
    isrc code: TCJPB2486201
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T08:09:27+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x0540a9da7bc8f6416acc8f00a5fda6c2b6fa7a5370513df8f3b1d3461733f139
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956634
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956634
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPB2486201
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-04T10:04:33Z
    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 0x0540a9da7bc8f6416acc8f00a5fda6c2b6fa7a5370513df8f3b1d3461733f139. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPB2486201.
      date published: 2026-07-04T10:04:33Z
    audio: キャビン・フレーバー
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 130.924
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.543
      additional property: Energy
        type: PropertyValue
        value: 0.777
      additional property: Speechiness
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name

Speechiness
type: PropertyValue
value: 0.048

Acousticness
type: PropertyValue
value: 0.061

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.264

Valence (Positivity)
type: PropertyValue
value: 0.772

Loudness (dB)
type: PropertyValue
value: -5.01

Key Name
type: PropertyValue
value: C#

Mode Name
type: PropertyValue
value: Minor