千佳
type: MusicGroup
popularity: 22
followers: 148
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3c2bb2647f796d22e0288aaaa2838fdc159e6b351ae9305244aa8ad2f85a3d19
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/272f5ac9-4fe2-43bc-8b85-4d4da74e356e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/272f5ac9-4fe2-43bc-8b85-4d4da74e356e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/272f5ac9-4fe2-43bc-8b85-4d4da74e356e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3c2bb2647f796d22e0288aaaa2838fdc159e6b351ae9305244aa8ad2f85a3d19","name":"千佳","registered_at":"2026-06-11T14:38:10Z","symbol":"NIM0051437","token_address":"0x076f1d09616ff4c292182f5aba38d70a0b0b289b","type":"artist","uuid":"272f5ac9-4fe2-43bc-8b85-4d4da74e356e"}
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 0x3c2bb2647f796d22e0288aaaa2838fdc159e6b351ae9305244aa8ad2f85a3d19. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/272f5ac9-4fe2-43bc-8b85-4d4da74e356e.json and https://artists.proofprofile.net/proofs/artist/272f5ac9-4fe2-43bc-8b85-4d4da74e356e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:28:13Z
  text: {"copyright_id":"0x3c2bb2647f796d22e0288aaaa2838fdc159e6b351ae9305244aa8ad2f85a3d19","name":"千佳","registered_at":"2026-06-11T14:38:10Z","symbol":"NIM0051437","token_address":"0x076f1d09616ff4c292182f5aba38d70a0b0b289b","type":"artist","uuid":"272f5ac9-4fe2-43bc-8b85-4d4da74e356e"}
album: 明日来信：告别象牙塔
  type: MusicAlbum
  date published: 2022-04-19
album: 告别象牙塔
  type: MusicAlbum
  date published: 2022-04-19
track: 刹那の人魚姫～Heart break mermaid～ - Full Spec Edition

刹那の人魚姫～Heart break mermaid～ - Full Spec Edition
type: MusicRecording
duration: PT4M35S
duration ms: 275251
explicit: false
by artist: 千佳
by artist: 彩也香
in album: 龍が如く0 誓いの場所 オリジナルサウンドトラック (Side B)
  type: MusicAlbum
  date published: 2015-03-18
isrc code: JPR501511925
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-05T07:47:00+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa0612809edbae793d2a49985d4e490007510f7291a0bc67e13f93b624ba2651e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953513
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953513
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPR501511925
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T12:47:07+00:00
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: 953513
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-06-13T12:47:07+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 0xa0612809edbae793d2a49985d4e490007510f7291a0bc67e13f93b624ba2651e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPR501511925.
  date published: 2026-06-13T15:41:10Z
audio: 刹那の人魚姫～Heart break mermaid～ - Full Spec Edition
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 138.34
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.663
  additional property: Energy
    type: PropertyValue
    value: 0.941
  additional property: Speechiness
    type: PropertyValue
    value: 0.037
  additional property: Acousticness
    type: PropertyValue
    value: 0.139
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.003
  additional property: Liveness
    type: PropertyValue
    value: 0.118
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.737
  additional property: Loudness (dB)
    type: PropertyValue
    value: -8.423
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Minor