苗代尚寛
type: MusicGroup
popularity: 2
followers: 7
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7f9e0b34cc5b770de5c97222736e4e301fe661e07d61cc523efd45a17b1c8557
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954555
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954555
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ad1dfcd6-5127-43c5-84d2-d29d93297f32.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ad1dfcd6-5127-43c5-84d2-d29d93297f32.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ad1dfcd6-5127-43c5-84d2-d29d93297f32
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T12:10:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7f9e0b34cc5b770de5c97222736e4e301fe661e07d61cc523efd45a17b1c8557","name":"苗代尚寛","registered_at":"2026-06-20T10:27:04Z","symbol":"NIM1590998","token_address":"0x204ef6fe04106717e2f6a8672229d8166ddb80b5","type":"artist","uuid":"ad1dfcd6-5127-43c5-84d2-d29d93297f32"}
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 0x7f9e0b34cc5b770de5c97222736e4e301fe661e07d61cc523efd45a17b1c8557. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad1dfcd6-5127-43c5-84d2-d29d93297f32.json and https://artists.proofprofile.net/proofs/artist/ad1dfcd6-5127-43c5-84d2-d29d93297f32.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T12:10:20Z
  text: {"copyright_id":"0x7f9e0b34cc5b770de5c97222736e4e301fe661e07d61cc523efd45a17b1c8557","name":"苗代尚寛","registered_at":"2026-06-20T10:27:04Z","symbol":"NIM1590998","token_address":"0x204ef6fe04106717e2f6a8672229d8166ddb80b5","type":"artist","uuid":"ad1dfcd6-5127-43c5-84d2-d29d93297f32"}
track: 空に逢う、朝を待つ
  type: MusicRecording
  duration: PT3M16S
  duration ms: 196363
  explicit: false
  by artist: Shun Ishiwaka
  by artist: 櫻/Ying
  by artist: 苗代尚寛
  by artist: Marty Holoubek
  in album: Songbook6
    type: MusicAlbum
    date published: 2023-03-08
  isrc code: JPS801962709
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-06T08:17:20+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xdb9edfdf4db4468da894014761e344d7733237386a88e81224ed32eb03b5efb6
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957819
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957819
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS801962709
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-13T07:53:33Z
  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 0xdb9edfdf4db4468da894014761e344d7733237386a88e81224ed32eb03b5efb6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/JPS801962709.
    date published: 2026-07-13T07:53:33Z
  audio: 空に逢う、朝を待つ
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 117.964
    additional property: Musical Key
      type: PropertyValue
      value: 1
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.525
    additional property: Energy
      type: PropertyValue
      value: 0.441
    additional property: Speechiness
      type: PropertyValue
      value: 0.034
    additional property: Acousticness
      type: PropertyValue
      value: 0.873
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.472
    additional property: Liveness
      type: PropertyValue
      value: 0.126
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.379
    additional property: Loudness (dB)
      type: PropertyValue
      value: -17.283
    additional property: Key Name
      type: PropertyValue
      value: C#
    additional property: Mode Name
      type: PropertyValue
      value: Major