二段優希
type: MusicGroup
popularity: 3
followers: 76
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x93a5faa6204ee86dd2a9a495876a45ecc16e702b4b3c2c6874b0e3bf41226d13
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/787656f2-b65d-4bec-99e0-26d86bdfc81b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/787656f2-b65d-4bec-99e0-26d86bdfc81b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/787656f2-b65d-4bec-99e0-26d86bdfc81b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x93a5faa6204ee86dd2a9a495876a45ecc16e702b4b3c2c6874b0e3bf41226d13","name":"二段優希","registered_at":"2026-06-17T07:37:14Z","symbol":"NIM1326139","token_address":"0xb7707f12bd3be67838f02a17c392d48947e3fb7c","type":"artist","uuid":"787656f2-b65d-4bec-99e0-26d86bdfc81b"}
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 0x93a5faa6204ee86dd2a9a495876a45ecc16e702b4b3c2c6874b0e3bf41226d13. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/787656f2-b65d-4bec-99e0-26d86bdfc81b.json and https://artists.proofprofile.net/proofs/artist/787656f2-b65d-4bec-99e0-26d86bdfc81b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x93a5faa6204ee86dd2a9a495876a45ecc16e702b4b3c2c6874b0e3bf41226d13","name":"二段優希","registered_at":"2026-06-17T07:37:14Z","symbol":"NIM1326139","token_address":"0xb7707f12bd3be67838f02a17c392d48947e3fb7c","type":"artist","uuid":"787656f2-b65d-4bec-99e0-26d86bdfc81b"}
album: 少女革命
  type: MusicAlbum
  date published: 2019-06-01
album: 純恋喫茶で逢いましょう
  type: MusicAlbum
  date published: 2020-03-01
album: 浪漫廻廊
  type: MusicAlbum
  date published: 2020-11-01
  track: Rebirth
    type: MusicRecording
    duration: PT3M37S
    duration ms: 217585
    explicit: false
    by artist: 二段優希
    in album: 浪漫廻廊
      type: MusicAlbum
      date published: 2020-11-01
    isrc code: JP92N2330329
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T23:08:34+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xea789f0fb2739f74082ff9b86a8e744f6c21027188a77fbaeaee4dca7cd25863
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959076
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959076
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JP92N2330329
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T23:41:40Z
    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 0xea789f0fb2739f74082ff9b86a8e744f6c21027188a77fbaeaee4dca7cd25863. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/JP92N2330329.
      date published: 2026-07-21T23:41:40Z
    audio: Rebirth
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 176.156
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.545
      additional property: Energy
        type: PropertyValue
        value: 0.789
      additional property: Speechiness
        type: PropertyValue
        value: 0.05
      additional property: Acousticness
        type: PropertyValue
        value: 0.153
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.002
      additional property: Liveness
        type: PropertyValue
        value: 0.113
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.509
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.203
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Live Live
  type: MusicAlbum
  date published: 2022-07-01