若井 友希
type: MusicGroup
genre: anime
popularity: 23
followers: 790
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0xb2806cb1e5fe1043360cd7a71cfbea69a5c660f8c09a28551434737c976990c5
additional property: OTSHash
additional property: OTSBitcoinBlock
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  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/834791bc-4e5b-49c7-b670-b9e548dd6800.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/834791bc-4e5b-49c7-b670-b9e548dd6800.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/834791bc-4e5b-49c7-b670-b9e548dd6800
additional property: OTSTimestamp
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additional property: OTSCanonicalRecord
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  value: {"copyright_id":"0xb2806cb1e5fe1043360cd7a71cfbea69a5c660f8c09a28551434737c976990c5","name":"若井 友希","registered_at":"2026-06-12T03:20:03Z","symbol":"NIM0171118","token_address":"0x7aea2853350a1cad2ae3742cb6cefae9e2806a05","type":"artist","uuid":"834791bc-4e5b-49c7-b670-b9e548dd6800"}
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 0xb2806cb1e5fe1043360cd7a71cfbea69a5c660f8c09a28551434737c976990c5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/834791bc-4e5b-49c7-b670-b9e548dd6800.json and https://artists.proofprofile.net/proofs/artist/834791bc-4e5b-49c7-b670-b9e548dd6800.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0xb2806cb1e5fe1043360cd7a71cfbea69a5c660f8c09a28551434737c976990c5","name":"若井 友希","registered_at":"2026-06-12T03:20:03Z","symbol":"NIM0171118","token_address":"0x7aea2853350a1cad2ae3742cb6cefae9e2806a05","type":"artist","uuid":"834791bc-4e5b-49c7-b670-b9e548dd6800"}
album: Destiny Sky
  type: MusicAlbum
  date published: 2012-11-07
track: おジャ魔女カーニバル!!

おジャ魔女カーニバル!!
type: MusicRecording
duration: PT3M33S
duration ms: 213080
explicit: false
by artist: 茜屋 日海夏
by artist: 若井 友希
by artist: 久保田 未夢
in album: カバ☆リス
  type: MusicAlbum
  date published: 2013-04-03
popularity: 39
isrc code: JPB601301732
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: OTSBitcoinBlock
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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/JPB601301732
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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4d06d33f9d6f0466ceb4a405bfeca88c3366c99a5717b4c70f836ef7789ceb. 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/JPB601301732.
  date published: 2026-06-13T15:41:10Z
audio: おジャ魔女カーニバル!!
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 150.665
  additional property: Musical Key
    type: PropertyValue
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  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
    type: PropertyValue
    value: 0.953
  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
    type: PropertyValue
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  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.88
  additional property: Loudness (dB)
    type: PropertyValue
    value: -7.088
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Minor