CHARCOAL FILTER
type: MusicGroup
genre: melodic hardcore
description: REDIRECTActivated carbon
popularity: 16
followers: 7322
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf4fceb6404528eac15322267debfb07365a9ca8234d74db53bd7345fa3c239bb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953592
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953592
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0303d17e-3190-4287-a9f7-333d0d205524.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0303d17e-3190-4287-a9f7-333d0d205524.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0303d17e-3190-4287-a9f7-333d0d205524
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T05:36:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf4fceb6404528eac15322267debfb07365a9ca8234d74db53bd7345fa3c239bb","name":"CHARCOAL FILTER","registered_at":"2026-06-14T04:45:55Z","symbol":"NIM0342716","token_address":"0x45c8ede6f4ce6692cb1bcf73013b1866aa7f4aa2","type":"artist","uuid":"0303d17e-3190-4287-a9f7-333d0d205524"}
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 0xf4fceb6404528eac15322267debfb07365a9ca8234d74db53bd7345fa3c239bb. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0303d17e-3190-4287-a9f7-333d0d205524.json and https://artists.proofprofile.net/proofs/artist/0303d17e-3190-4287-a9f7-333d0d205524.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T05:36:59Z
  text: {"copyright_id":"0xf4fceb6404528eac15322267debfb07365a9ca8234d74db53bd7345fa3c239bb","name":"CHARCOAL FILTER","registered_at":"2026-06-14T04:45:55Z","symbol":"NIM0342716","token_address":"0x45c8ede6f4ce6692cb1bcf73013b1866aa7f4aa2","type":"artist","uuid":"0303d17e-3190-4287-a9f7-333d0d205524"}
album: やさしさライセンス/BY MY SIDE
  type: MusicAlbum
  date published: 2003
  track: やさしさライセンス
    type: MusicRecording
    duration: PT4M14S
    duration ms: 254960
    explicit: false
    by artist: CHARCOAL FILTER
    in album: やさしさライセンス/BY MY SIDE
      type: MusicAlbum
      date published: 2003
    genre: melodic hardcore
    isrc code: JPAM00300620
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T03:51:49+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x90a7d3ba62b4c112001a5cb8ad81f26d0ca206a644d9892aae9257333922dd9f
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956891
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956891
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPAM00300620
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T07:16:32Z
    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 0x90a7d3ba62b4c112001a5cb8ad81f26d0ca206a644d9892aae9257333922dd9f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JPAM00300620.
      date published: 2026-07-06T07:16:32Z
    audio: やさしさライセンス
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 124.892
      additional property: Musical Key
        type: PropertyValue
        value: 3
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.561
      additional property: Energy
        type: PropertyValue
        value: 0.952
      additional property: Speechiness
        type: PropertyValue
        value: 0.052
      additional property: Acousticness
        type: PropertyValue
        value: 0
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.11
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.843
      additional property: Loudness (dB)
        type: PropertyValue
        value: -3.86
      additional property: Key Name
        type: PropertyValue
        value: Eb
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: 虹
  type: MusicAlbum
  date published: 2003
album: Happy Set
  type: MusicAlbum
  date published: 2003-05-21
  track: 虹
    type: MusicRecording
    duration: PT4M11S
    duration ms: 251826
    explicit: false
    by artist: CHARCOAL FILTER
    in album: Happy Set
      type: MusicAlbum
      date published: 2003-05-21
    genre: melodic hardcore
    isrc code: JPWP00303820
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T04:04:45+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xe64d43597b3bfa0da6d8250ac70aa8e8e696964a6bcf611da43c8b3cdac818aa
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958238
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958238
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP00303820
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T07:03:57Z
    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 0xe64d43597b3bfa0da6d8250ac70aa8e8e696964a6bcf611da43c8b3cdac818aa. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:03:57Z), 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/JPWP00303820.
      date published: 2026-07-16T07:03:57Z
    audio: 虹
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 97.927
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.518
      additional property: Energy
        type: PropertyValue
        value: 0.933
      additional property: Speechiness
        type: PropertyValue
        value: 0.033
      additional property: Acousticness
        type: PropertyValue
        value: 0.019
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: one Days
album: CHARCOAL FILTER
album: Gimme A Light 2

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.305

Valence (Positivity)
type: PropertyValue
value: 0.74

Loudness (dB)
type: PropertyValue
value: -2.425

Key Name
type: PropertyValue
value: Bb

Mode Name
type: PropertyValue
value: Major

one Days
type: MusicAlbum
date published: 2004

CHARCOAL FILTER
type: MusicAlbum
date published: 2004-09-23

Gimme A Light 2
type: MusicAlbum
date published: 2005-05-11