Seki San
type: MusicGroup
popularity: 4
followers: 51
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0e16f3bebef540660a9ca20ec26c791ccff66bb635e39e3608f6b9b2ffce6802
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953932
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953932
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1f52496e-0256-47fc-bcf3-526ada32d903.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1f52496e-0256-47fc-bcf3-526ada32d903.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1f52496e-0256-47fc-bcf3-526ada32d903
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T11:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x0e16f3bebef540660a9ca20ec26c791ccff66bb635e39e3608f6b9b2ffce6802","name":"Seki San","registered_at":"2026-06-16T00:28:26Z","symbol":"NIM0880160","token_address":"0xe9243478861cbe56862fe6c5d7076a433b3ed1d9","type":"artist","uuid":"1f52496e-0256-47fc-bcf3-526ada32d903"}
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 0x0e16f3bebef540660a9ca20ec26c791ccff66bb635e39e3608f6b9b2ffce6802. Chain 2 (Bitcoin): anchored in block 953932 (2026-06-16T11:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f52496e-0256-47fc-bcf3-526ada32d903.json and https://artists.proofprofile.net/proofs/artist/1f52496e-0256-47fc-bcf3-526ada32d903.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T11:10:43Z
  text: {"copyright_id":"0x0e16f3bebef540660a9ca20ec26c791ccff66bb635e39e3608f6b9b2ffce6802","name":"Seki San","registered_at":"2026-06-16T00:28:26Z","symbol":"NIM0880160","token_address":"0xe9243478861cbe56862fe6c5d7076a433b3ed1d9","type":"artist","uuid":"1f52496e-0256-47fc-bcf3-526ada32d903"}
album: Tokyo Café
  type: MusicAlbum
  date published: 2022-05-23
  track: Shinjuku Café
    type: MusicRecording
    duration: PT2M48S
    duration ms: 168000
    explicit: false
    by artist: Seki San
    in album: Tokyo Café
      type: MusicAlbum
      date published: 2022-05-23
    isrc code: SEXGF2200962
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T02:34:34+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x3d8f1399da3dac0e87e5dbc4b2fe119a68c72302cdc13fc4ab3bb1f11a1d0bb7
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958228
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958228
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEXGF2200962
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T02:46:47Z
    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 0x3d8f1399da3dac0e87e5dbc4b2fe119a68c72302cdc13fc4ab3bb1f11a1d0bb7. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/SEXGF2200962.
      date published: 2026-07-16T02:46:47Z
    audio: Shinjuku Café
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 115.54
      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: 0.28
      additional property: Energy
        type: PropertyValue
        value: 0.973
      additional property: Speechiness
        type: PropertyValue
        value: 0.077
      additional property: Acousticness
        type: PropertyValue
        value: 0.549
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.001
      additional property: Liveness
        type: PropertyValue
        value: 0.218
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.022
      additional property: Loudness (dB)
        type: PropertyValue
        value: -14.322
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Izakaya Nights
  type: MusicAlbum
  date published: 2022-05-23
album: Tokyo Rain Period
  type: MusicAlbum
  date published: 2022-05-23