スティーヴ・マーカス
type: MusicGroup
genre: free jazz
genre: jazz fusion
popularity: 4
followers: 245
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x88987b1a3686f52c555fc63a6df2ab3ee4d5f6597260340ff8e3729b482deb3a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8e5a7609-ff23-49cf-8bb7-4644a4a9660c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8e5a7609-ff23-49cf-8bb7-4644a4a9660c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/8e5a7609-ff23-49cf-8bb7-4644a4a9660c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x88987b1a3686f52c555fc63a6df2ab3ee4d5f6597260340ff8e3729b482deb3a","name":"スティーヴ・マーカス","registered_at":"2026-06-17T15:20:59Z","symbol":"NIM1436671","token_address":"0x36f8d43ef34cf96c47f670bb3e91f8687201ff78","type":"artist","uuid":"8e5a7609-ff23-49cf-8bb7-4644a4a9660c"}
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 0x88987b1a3686f52c555fc63a6df2ab3ee4d5f6597260340ff8e3729b482deb3a. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e5a7609-ff23-49cf-8bb7-4644a4a9660c.json and https://artists.proofprofile.net/proofs/artist/8e5a7609-ff23-49cf-8bb7-4644a4a9660c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0x88987b1a3686f52c555fc63a6df2ab3ee4d5f6597260340ff8e3729b482deb3a","name":"スティーヴ・マーカス","registered_at":"2026-06-17T15:20:59Z","symbol":"NIM1436671","token_address":"0x36f8d43ef34cf96c47f670bb3e91f8687201ff78","type":"artist","uuid":"8e5a7609-ff23-49cf-8bb7-4644a4a9660c"}
album: サムシング
  type: MusicAlbum
  date published: 1971-01-25
  track: SOMETHING
    type: MusicRecording
    duration: PT6M44S
    duration ms: 404960
    explicit: false
    by artist: スティーヴ・マーカス
    in album: サムシング
      type: MusicAlbum
      date published: 1971-01-25
    genre: free jazz
    genre: jazz fusion
    isrc code: JPCO07045290
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T16:34:24+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x15c51738540715e84e9449ce110fdc9954c29549446649186acca93115c2ee4d
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958761
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958761
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCO07045290
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T17:49:48Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c51738540715e84e9449ce110fdc9954c29549446649186acca93115c2ee4d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/JPCO07045290.
      date published: 2026-07-19T17:49:48Z
    audio: SOMETHING
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 136.417
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.466
      additional property: Energy
        type: PropertyValue
        value: 0.419
      additional property: Speechiness
        type: PropertyValue
        value: 0.033
      additional property: Acousticness
        type: PropertyValue
        value: 0.293
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.541
      additional property: Liveness
        type: PropertyValue
        value: 0.121
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.429
      additional property: Loudness (dB)
        type: PropertyValue
        value: -11.842
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major