HARCO
type: MusicGroup
genre: shibuya-kei
description: Harco may refer to: Harco, Illinois, United States Harcó, a village in Pănet, Romania Harco, Inc., an American drugstore chain acquired by Rite Aid Corporation Harco (Harlow Chemical Company), a
popularity: 17
followers: 1854
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf4108a98607ba99302d3bc009f10ba2038e3e1c18bf43562f58668c2c333b839
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953625
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953625
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/237b72bf-7f43-4bde-be77-a74ace1e8993.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/237b72bf-7f43-4bde-be77-a74ace1e8993.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/237b72bf-7f43-4bde-be77-a74ace1e8993
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T11:37:06Z
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4108a98607ba99302d3bc009f10ba2038e3e1c18bf43562f58668c2c333b839. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/237b72bf-7f43-4bde-be77-a74ace1e8993.json and https://artists.proofprofile.net/proofs/artist/237b72bf-7f43-4bde-be77-a74ace1e8993.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T11:37:06Z
album: Enoshima Rhapsody
  type: MusicAlbum
  date published: 1999-03-24
album: 江ノ島ラプソディ
  type: MusicAlbum
  date published: 1999-03-24
album: スローモーション
  type: MusicAlbum
  date published: 1999-12-01
album: Slow Motion
  type: MusicAlbum
  date published: 1999-12-01
album: HARCO
  type: MusicAlbum
  date published: 2002-04-10
album: winter sports rainbow
  type: MusicAlbum
  date published: 2002-11-27
album: Sekai De Ichiban Ganbatteru Kimi Ni
  type: MusicAlbum
  date published: 2007-03-14
album: 世界でいちばん頑張ってる君に
  type: MusicAlbum
  date published: 2007-03-14
album: PIANO PIECES
  type: MusicAlbum
  date published: 2010-07-30
album: PIANO PIECES
  type: MusicAlbum
  date published: 2010-07-30
album: ハルフェス･トライアングル
  type: MusicAlbum
  date published: 2012-04-11
album: ハルフェス･トライアングル
  type: MusicAlbum
  date published: 2012-04-11
album: 南三陸ミシン工房のうた
  type: MusicAlbum
  date published: 2016-03-07
  track: 世界でいちばん頑張ってる君に - 弾き語り
    type: MusicRecording
    duration: PT4M44S
    duration ms: 284920
    explicit: false
    by artist: HARCO
    in album: 南三陸ミシン工房のうた
      type: MusicAlbum
      date published: 2016-03-07
    genre: shibuya-kei
    isrc code: JPZ921401098
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T16:04:12+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x3e6b68badc32137768321739b8fd5a6539a27a0a605f91cf41a1cb8b7631c113
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958436
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958436
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921401098
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T16:42:22Z
    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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6b68badc32137768321739b8fd5a6539a27a0a605f91cf41a1cb8b7631c113. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/JPZ921401098.
      date published: 2026-07-17T16:42:22Z
    audio: 世界でいちばん頑張ってる君に - 弾き語り
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 125.943
      additional property: Musical Key
        type: PropertyValue
        value: 6
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.848
      additional property: Energy
        type: PropertyValue
        value: 0.189
      additional property: Speechiness
        type: PropertyValue
        value: 0.04
      additional property: Acousticness
        type: PropertyValue
        value: 0.932
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.144
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.4
      additional property: Loudness (dB)
        type: PropertyValue
        value: -10.911
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Songs of Minami Sanriku Sewing Workshop
  type: MusicAlbum
  date published: 2016-03-07
album: Night Hike
  type: MusicAlbum
  date published: 2017-09-09
album: E/NH/WL
  type: MusicAlbum
  date published: 2017-09-09
album: E/NH/WL
  type: MusicAlbum
  date published: 2017-09-09
album: Night Hike
  type: MusicAlbum
  date published: 2017-09-09