Calx !¡
type: MusicGroup
popularity: 12
followers: 41
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x61b375725601f7e1ffa5c99c59fe07964929fcb75d8ad6c5c3ac6d0b377cda4a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953807
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953807
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ee44636b-4351-417d-87f8-8eda54284ea7.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ee44636b-4351-417d-87f8-8eda54284ea7.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ee44636b-4351-417d-87f8-8eda54284ea7
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T16:39:18Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x61b375725601f7e1ffa5c99c59fe07964929fcb75d8ad6c5c3ac6d0b377cda4a","name":"Calx !¡","registered_at":"2026-06-15T05:33:36Z","symbol":"NIM0697658","token_address":"0xfa4eba2f2e5474c057980a80d9d471667a9dc3e9","type":"artist","uuid":"ee44636b-4351-417d-87f8-8eda54284ea7"}
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 0x61b375725601f7e1ffa5c99c59fe07964929fcb75d8ad6c5c3ac6d0b377cda4a. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee44636b-4351-417d-87f8-8eda54284ea7.json and https://artists.proofprofile.net/proofs/artist/ee44636b-4351-417d-87f8-8eda54284ea7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T16:39:18Z
  text: {"copyright_id":"0x61b375725601f7e1ffa5c99c59fe07964929fcb75d8ad6c5c3ac6d0b377cda4a","name":"Calx !¡","registered_at":"2026-06-15T05:33:36Z","symbol":"NIM0697658","token_address":"0xfa4eba2f2e5474c057980a80d9d471667a9dc3e9","type":"artist","uuid":"ee44636b-4351-417d-87f8-8eda54284ea7"}
album: silent night
  type: MusicAlbum
  date published: 2023-07-09
album: There Will Never Be Another You
  type: MusicAlbum
  date published: 2023-07-19
album: Divided Paths
  type: MusicAlbum
  date published: 2023-08-30
album: VIBES 平和
  type: MusicAlbum
  date published: 2023-09-29
album: Divided Paths
  type: MusicAlbum
  date published: 2023-09-30
album: Gentle Cold Breeze
  type: MusicAlbum
  date published: 2023-10-29
album: idealism.
  type: MusicAlbum
  date published: 2023-12-31
album: Duvet (lofi version)
  type: MusicAlbum
  date published: 2024-02-08
album: Tokyo Groove
  type: MusicAlbum
  date published: 2024-02-08
album: KURAI CO.
  type: MusicAlbum
  date published: 2024-04-10
album: Miyamoto Musashi (Remix)
  type: MusicAlbum
  date published: 2024-04-14
album: Evangelion N' Chill
  type: MusicAlbum
  date published: 2024-04-28
album: Cult Classic
  type: MusicAlbum
  date published: 2024-05-08
album: Shinsei
  type: MusicAlbum
  date published: 2024-09-01
album: feelings and all.
  type: MusicAlbum
  date published: 2024-09-26
album: Calx.
  type: MusicAlbum
  date published: 2025-01-01
album: YL4NG YL4NG
  type: MusicAlbum
  date published: 2025-01-17
  track: YL4NG YL4NG
    type: MusicRecording
    duration: PT2M29S
    duration ms: 149538
    explicit: false
    by artist: Calx !¡
    in album: YL4NG YL4NG
      type: MusicAlbum
      date published: 2025-01-17
    isrc code: ESA012509814
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T03:52:23+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x3f445f8c3423cab6100de0c9df7b1ed4f020082c62549d91662ec71693fd409b
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956474
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956474
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA012509814
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T08:56:35Z
    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 0x3f445f8c3423cab6100de0c9df7b1ed4f020082c62549d91662ec71693fd409b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ESA012509814.
      date published: 2026-07-03T08:56:35Z
    audio: YL4NG YL4NG
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 129.978
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.874
      additional property: Energy
        type: PropertyValue
        value: 0.175
      additional property: Speechiness
        type: PropertyValue
        value: 0.053
      additional property: Acousticness
        type: PropertyValue
        value: 0.853
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.827
      additional property: Liveness
        type: PropertyValue
        value: 0.113
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.229
      additional property: Loudness (dB)
        type: PropertyValue
        value: -12.714
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: YL4NG YL4NG (Lo-fi)
  type: MusicAlbum
  date published: 2025-01-17
  track: YL4NG YL4NG - Lo-fi
    type: MusicRecording
    duration: PT2M29S
    duration ms: 149559
    explicit: false
    by artist: Calx !¡
    in album: YL4NG YL4NG (Lo-fi)
      type: MusicAlbum
      date published: 2025-01-17
    isrc code: ESA012509807
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T20:33:22+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xb0ee6c09f1d9b97154481eb65f18bc974894cb3c2877775d5caac089172e5b2d
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956578
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956578
    additional property: OTSVerificationAPI
    additional property: OTSTimestamp
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: YL4NG YL4NG - Lo-fi
album: Pondering
album: Bon Voyage

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA012509807

OTSTimestamp
type: PropertyValue
value: 2026-07-04T02:23:20Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ee6c09f1d9b97154481eb65f18bc974894cb3c2877775d5caac089172e5b2d. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/ESA012509807.
date published: 2026-07-04T02:23:20Z

YL4NG YL4NG - Lo-fi
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 130.062
additional property: Musical Key
  type: PropertyValue
  value: 5
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.859
additional property: Energy
  type: PropertyValue
  value: 0.231
additional property: Speechiness
  type: PropertyValue
  value: 0.043
additional property: Acousticness
  type: PropertyValue
  value: 0.797
additional property: Instrumentalness
  type: PropertyValue
  value: 0.908
additional property: Liveness
  type: PropertyValue
  value: 0.113
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.228
additional property: Loudness (dB)
  type: PropertyValue
  value: -10.323
additional property: Key Name
  type: PropertyValue
  value: F
additional property: Mode Name
  type: PropertyValue
  value: Major

Pondering
type: MusicAlbum
date published: 2025-04-25

Bon Voyage
type: MusicAlbum
date published: 2025-06-13
track: Bienvenue
  type: MusicRecording
  duration: PT1M0S
  duration ms: 60875
  explicit: false
  by artist: Calx !¡
  in album: Bon Voyage
    type: MusicAlbum
    date published: 2025-06-13
  isrc code: ESA012588402
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-15T04:03:51+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x04d6ba458786b0615cfb62d7a9d6d07a95a02ee44f78f35acbfac1d22e8d9ccc
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958104
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958104
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA012588402
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-15T05:34:05Z
  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 0x04d6ba458786b0615cfb62d7a9d6d07a95a02ee44f78f35acbfac1d22e8d9ccc. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/ESA012588402.
    date published: 2026-07-15T05:34:05Z
  audio: Bienvenue
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 126.372
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.721
    additional property: Energy
      type: PropertyValue
      value: 0.097
    additional property: Speechiness
      type: PropertyValue
      value: 0.047
    additional property: Acousticness
      type: PropertyValue
      value: 0.835
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.859
    additional property: Liveness
      type: PropertyValue
      value: 0.102
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.901
    additional property: Loudness (dB)
      type: PropertyValue
      value: -26.514
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Tokyo What?
  type: MusicRecording
  duration: PT1M3S
  duration ms: 63755
  explicit: false
  by artist: Calx !¡
  in album: Bon Voyage
    type: MusicAlbum
    date published: 2025-06-13
  isrc code: ESA012588408
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-06T01:22:16+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x78da575fce0f9c750cabcf584ba8121512e02e0ed66b444f067ff5f7b6876739
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956856
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956856
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA012588408
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-06T01:25:57Z
  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 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 0x78da575fce0f9c750cabcf584ba8121512e02e0ed66b444f067ff5f7b6876739. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ESA012588408.
    date published: 2026-07-06T01:25:57Z
  audio: Tokyo What?
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 149.657
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.706
    additional property: Energy
      type: PropertyValue
      value: 0.424
    additional property: Speechiness
      type: PropertyValue
      value: 0.509
    additional property: Acousticness
      type: PropertyValue
      value: 0.872
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.18
    additional property: Liveness
      type: PropertyValue
      value: 0.112
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.675
    additional property: Loudness (dB)
      type: PropertyValue
      value: -9.778
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Minor