関口将史
type: MusicGroup
popularity: 2
followers: 69
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8fe49910dbf12ec52fa24fbdd9a009bbb404cf964cf0cc3cfd7e4b23704d46b4
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953928
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953928
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1e2d5c69-2207-4e6d-a280-7b66f4f61b64.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1e2d5c69-2207-4e6d-a280-7b66f4f61b64.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1e2d5c69-2207-4e6d-a280-7b66f4f61b64
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T10:21:55Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8fe49910dbf12ec52fa24fbdd9a009bbb404cf964cf0cc3cfd7e4b23704d46b4","name":"関口将史","registered_at":"2026-06-16T00:07:27Z","symbol":"NIM0875148","token_address":"0x4de434ca748c958d180c2fcc79f92fecad6f5018","type":"artist","uuid":"1e2d5c69-2207-4e6d-a280-7b66f4f61b64"}
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 0x8fe49910dbf12ec52fa24fbdd9a009bbb404cf964cf0cc3cfd7e4b23704d46b4. Chain 2 (Bitcoin): anchored in block 953928 (2026-06-16T10:21:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e2d5c69-2207-4e6d-a280-7b66f4f61b64.json and https://artists.proofprofile.net/proofs/artist/1e2d5c69-2207-4e6d-a280-7b66f4f61b64.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T10:21:55Z
  text: {"copyright_id":"0x8fe49910dbf12ec52fa24fbdd9a009bbb404cf964cf0cc3cfd7e4b23704d46b4","name":"関口将史","registered_at":"2026-06-16T00:07:27Z","symbol":"NIM0875148","token_address":"0x4de434ca748c958d180c2fcc79f92fecad6f5018","type":"artist","uuid":"1e2d5c69-2207-4e6d-a280-7b66f4f61b64"}
album: 此の呼吸
  type: MusicAlbum
  date published: 2022-09-28
track: 私を呼んだ 夏の空のような - feat. 兼松衆, 須原杏, 関口将史

私を呼んだ 夏の空のような - feat. 兼松衆, 須原杏, 関口将史
type: MusicRecording
duration: PT4M39S
duration ms: 279487
explicit: false
by artist: 高木大丈夫
by artist: 兼松 衆
by artist: 須原杏
by artist: 関口将史
in album: 私を呼んだ 夏の空のような (feat. 兼松衆, 須原杏, 関口将史)
  type: MusicAlbum
  date published: 2023-08-02
genre: japanese-indie
isrc code: JPG102301037
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-27T09:27:46+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x235a945750ad257e9a119e81d8cf6b53874d35b8379a6441dd5ce69a73bb2c9c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956304
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG102301037
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 956304
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-02T03:55:08+00:00
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235a945750ad257e9a119e81d8cf6b53874d35b8379a6441dd5ce69a73bb2c9c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPG102301037.
  date published: 2026-07-02T03:55:08Z
audio: 私を呼んだ 夏の空のような - feat. 兼松衆, 須原杏, 関口将史
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 143.873
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.343
  additional property: Energy
    type: PropertyValue
    value: 0.168
  additional property: Speechiness
    type: PropertyValue
    value: 0.039
  additional property: Acousticness
    type: PropertyValue
    value: 0.978
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.086
  additional property: Liveness
    type: PropertyValue
    value: 0.093
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.177
  additional property: Loudness (dB)
    type: PropertyValue
    value: -16.105
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Major