Keichan
type: MusicGroup
popularity: 14
followers: 3862
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xec54f7b7c5f7ff82007d3529129f3f166c9242c33fa755bf103b15b02cf61c85
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/06f4a490-4c7e-4cf6-9a9f-28b6795d6095.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/06f4a490-4c7e-4cf6-9a9f-28b6795d6095.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/06f4a490-4c7e-4cf6-9a9f-28b6795d6095
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T05:36:59Z
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 0xec54f7b7c5f7ff82007d3529129f3f166c9242c33fa755bf103b15b02cf61c85. 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/06f4a490-4c7e-4cf6-9a9f-28b6795d6095.json and https://artists.proofprofile.net/proofs/artist/06f4a490-4c7e-4cf6-9a9f-28b6795d6095.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T05:36:59Z
album: 鬼滅の刃 (Live)
  type: MusicAlbum
  date published: 2020-01-30
album: 鬼滅の刃
  type: MusicAlbum
  date published: 2020-02-01
album: Gararabako
  type: MusicAlbum
  date published: 2021-06-30
album: 殻落箱
  type: MusicAlbum
  date published: 2021-06-30
album: Zero Rhapsody
  type: MusicAlbum
  date published: 2022-09-07
album: かげおくり
  type: MusicAlbum
  date published: 2022-10-26
album: かげおくり
  type: MusicAlbum
  date published: 2022-10-26
album: Edo
  type: MusicAlbum
  date published: 2022-12-14
album: 聴十戯画
  type: MusicAlbum
  date published: 2022-12-14
album: 聴十戯画
  type: MusicAlbum
  date published: 2022-12-14
album: 聴十戯画
  type: MusicAlbum
  date published: 2022-12-14
album: シンフォニア
  type: MusicAlbum
  date published: 2023-06-02
album: シンフォニア
  type: MusicAlbum
  date published: 2023-06-02
album: シンフォニア
  type: MusicAlbum
  date published: 2023-06-02
album: 馬の耳ドロップ
  type: MusicAlbum
  date published: 2023-09-06
album: 馬の耳ドロップ feat. majiko
  type: MusicAlbum
  date published: 2023-09-06
album: 馬の耳ドロップ
  type: MusicAlbum
  date published: 2023-09-06
album: 円人
  type: MusicAlbum
  date published: 2023-12-06
album: 円人
  type: MusicAlbum
  date published: 2023-12-06
album: 円人
  type: MusicAlbum
  date published: 2023-12-06
album: 愛葬 feat. majiko
  type: MusicAlbum
  date published: 2023-12-06
album: Echoes
  type: MusicAlbum
  date published: 2025-01-29
album: Echoes
  type: MusicAlbum
  date published: 2025-01-29
album: Echoes
  type: MusicAlbum
  date published: 2025-01-29
  track: √Advent
    type: MusicRecording
    duration: PT3M52S
    duration ms: 232973
    explicit: false
    by artist: Keichan
    in album: Echoes
      type: MusicAlbum
      date published: 2025-01-29
    isrc code: JPTK02406610
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T06:50:27+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x9e8d57541254de899ffb4265e9cbdc80a208e454ff23db251cada314532316a8
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956894
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956894
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPTK02406610
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T07:53:57Z
    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 0x9e8d57541254de899ffb4265e9cbdc80a208e454ff23db251cada314532316a8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/JPTK02406610.
      date published: 2026-07-06T07:53:57Z
    audio: √Advent
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 154.016
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.446
      additional property: Energy
        type: PropertyValue
        value: 0.958
      additional property: Speechiness
        type: PropertyValue
        value: 0.05
      additional property: Acousticness
        type: PropertyValue
        value: 0.041
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.886
      additional property: Liveness
        type: PropertyValue
        value: 0.154
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.689
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.02
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Minor
  track: Fortuna's Call
    type: MusicRecording
    duration: PT5M1S
    duration ms: 301880
    explicit: false
    by artist: Keichan
    in album: Echoes
      type: MusicAlbum
      date published: 2025-01-29
    isrc code: JPTK02406650
    additional property: CopyrightID
    additional property: CopyrightStatus
    additional property: CopyrightRegisteredAt
    additional property: CopyrightChainExplorerURL
    additional property: OTSHash
    additional property: OTSBitcoinBlock
    additional property: OTSBitcoinBlockVerifyURL
    additional property: OTSVerificationAPI
    additional property: OTSTimestamp
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: Fortuna's Call

CopyrightID
type: PropertyValue

CopyrightStatus
type: PropertyValue
value: registered

CopyrightRegisteredAt
type: PropertyValue
value: 2026-07-06T01:12:57+00:00

CopyrightChainExplorerURL
type: PropertyValue
value: https://explorer.copyrightchains.com/tx/0x9beccf16ddb5e3146fd6f208034aecc234b18581cc0a6d2447253208d816eb47

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 956856

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/956856

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPTK02406650

OTSTimestamp
type: PropertyValue
value: 2026-07-06T01:25:57Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9beccf16ddb5e3146fd6f208034aecc234b18581cc0a6d2447253208d816eb47. 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/JPTK02406650.
date published: 2026-07-06T01:25:57Z

Fortuna's Call
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 165.083
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: 0.251
additional property: Energy
  type: PropertyValue
  value: 0.921
additional property: Speechiness
  type: PropertyValue
  value: 0.059
additional property: Acousticness
  type: PropertyValue
  value: 0.023
additional property: Instrumentalness
  type: PropertyValue
  value: 0.85
additional property: Liveness
  type: PropertyValue
  value: 0.126
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.494
additional property: Loudness (dB)
  type: PropertyValue
  value: -6.662
additional property: Key Name
  type: PropertyValue
  value: C#
additional property: Mode Name
  type: PropertyValue
  value: Minor