鷹城恭二 (CV.梅原裕一郎)
type: MusicGroup
popularity: 17
followers: 263
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xcfb49ce9eb3863e74697258f36e6980694443c3ad862c6f606f58a5a61b80d35
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953770
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953770
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c3edf3a9-7d32-46e1-964f-31c9937660e5.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c3edf3a9-7d32-46e1-964f-31c9937660e5.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c3edf3a9-7d32-46e1-964f-31c9937660e5
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T09:50:11Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xcfb49ce9eb3863e74697258f36e6980694443c3ad862c6f606f58a5a61b80d35","name":"鷹城恭二 (CV.梅原裕一郎)","registered_at":"2026-06-15T01:06:57Z","symbol":"NIM0633986","token_address":"0xa79ae02e75d8667fd4bb24a60c6d887c4e6700c5","type":"artist","uuid":"c3edf3a9-7d32-46e1-964f-31c9937660e5"}
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 0xcfb49ce9eb3863e74697258f36e6980694443c3ad862c6f606f58a5a61b80d35. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3edf3a9-7d32-46e1-964f-31c9937660e5.json and https://artists.proofprofile.net/proofs/artist/c3edf3a9-7d32-46e1-964f-31c9937660e5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T09:50:11Z
  text: {"copyright_id":"0xcfb49ce9eb3863e74697258f36e6980694443c3ad862c6f606f58a5a61b80d35","name":"鷹城恭二 (CV.梅原裕一郎)","registered_at":"2026-06-15T01:06:57Z","symbol":"NIM0633986","token_address":"0xa79ae02e75d8667fd4bb24a60c6d887c4e6700c5","type":"artist","uuid":"c3edf3a9-7d32-46e1-964f-31c9937660e5"}
album: THE IDOLM@STER SideM WORLD TRE@SURE 13
  type: MusicAlbum
  date published: 2020
album: THE IDOLM@STER SideM WORLD TRE@SURE 13
  type: MusicAlbum
  date published: 2020-04-01
  track: Welcome to Japan！
    type: MusicRecording
    duration: PT4M49S
    duration ms: 289453
    explicit: false
    by artist: 鷹城恭二 (CV.梅原裕一郎)
    in album: THE IDOLM@STER SideM WORLD TRE@SURE 13
      type: MusicAlbum
      date published: 2020-04-01
    isrc code: JPI102000220
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T06:42:58+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x2655ef26af800897e92a14989ac578bf81188a99243d23c2494fd1349a9b8124
    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/JPI102000220
    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 0x2655ef26af800897e92a14989ac578bf81188a99243d23c2494fd1349a9b8124. 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/JPI102000220.
      date published: 2026-07-03T08:56:35Z
    audio: Welcome to Japan！
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 139.976
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.598
      additional property: Energy
        type: PropertyValue
        value: 0.934
      additional property: Speechiness
        type: PropertyValue
        value: 0.048
      additional property: Acousticness
        type: PropertyValue
        value: 0.042
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.167
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.628
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.266
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Major
  track: MEET THE WORLD! - JAPAN Ver.
    type: MusicRecording
    duration: PT4M53S
    duration ms: 293746
    explicit: false
    by artist: 鷹城恭二 (CV.梅原裕一郎)
    in album: THE IDOLM@STER SideM WORLD TRE@SURE 13
      type: MusicAlbum
      date published: 2020-04-01
    isrc code: JPI102000221
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T03:54:19+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x64a52ed88037cd4c3d9fe43d1cceec15649abdc885e2f5131584cde21f65e22e
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956889
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956889
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPI102000221
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T06:56:49Z
    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 0x64a52ed88037cd4c3d9fe43d1cceec15649abdc885e2f5131584cde21f65e22e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPI102000221.
      date published: 2026-07-06T06:56:49Z
    audio: MEET THE WORLD! - JAPAN Ver.
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 137.015
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.547
      additional property: Energy
        type: PropertyValue
        value: 0.938
      additional property: Speechiness
        type: PropertyValue
        value: 0.068
      additional property: Acousticness
        type: PropertyValue
        value: 0.348
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.384
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.706
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name

Loudness (dB)
type: PropertyValue
value: -4.05

Key Name
type: PropertyValue
value: C#

Mode Name
type: PropertyValue
value: Major