Taku Tomizawa
type: MusicGroup
popularity: 3
followers: 61
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc12b16ef9bd721be1a83f0e9651a31ef752df52dcfedbdc67adbf0db3be174a2
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/6bfabb87-83bd-4b6f-92c5-888f6cf54bbf.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6bfabb87-83bd-4b6f-92c5-888f6cf54bbf.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/6bfabb87-83bd-4b6f-92c5-888f6cf54bbf
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc12b16ef9bd721be1a83f0e9651a31ef752df52dcfedbdc67adbf0db3be174a2","name":"Taku Tomizawa","registered_at":"2026-06-17T03:16:57Z","symbol":"NIM1264051","token_address":"0xd3a7f4ab4386047140e60182efd0f5ba5c54789b","type":"artist","uuid":"6bfabb87-83bd-4b6f-92c5-888f6cf54bbf"}
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 0xc12b16ef9bd721be1a83f0e9651a31ef752df52dcfedbdc67adbf0db3be174a2. 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/6bfabb87-83bd-4b6f-92c5-888f6cf54bbf.json and https://artists.proofprofile.net/proofs/artist/6bfabb87-83bd-4b6f-92c5-888f6cf54bbf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xc12b16ef9bd721be1a83f0e9651a31ef752df52dcfedbdc67adbf0db3be174a2","name":"Taku Tomizawa","registered_at":"2026-06-17T03:16:57Z","symbol":"NIM1264051","token_address":"0xd3a7f4ab4386047140e60182efd0f5ba5c54789b","type":"artist","uuid":"6bfabb87-83bd-4b6f-92c5-888f6cf54bbf"}
album: いずれ
  type: MusicAlbum
  date published: 2016-04-27
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  type: MusicAlbum
  date published: 2017-03-22
album: そのさき 036REMIX
  type: MusicAlbum
  date published: 2017-07-19
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  type: MusicAlbum
  date published: 2017-07-19
album: 誰のために桜は咲く
  type: MusicAlbum
  date published: 2018-03-11
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  type: MusicAlbum
  date published: 2025-03-05
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  type: MusicAlbum
  date published: 2025-04-09