Seiji Niizawa
type: MusicGroup
genre: downtempo
genre: organic house
popularity: 2
followers: 178
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x39517f624bfb8f7ed0cf2d44b4032583e2e7918f05aee679920a9e224f2d7cf5
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/76997bea-5d6d-4183-acbc-73bb2c1a17ec.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/76997bea-5d6d-4183-acbc-73bb2c1a17ec.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/76997bea-5d6d-4183-acbc-73bb2c1a17ec
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x39517f624bfb8f7ed0cf2d44b4032583e2e7918f05aee679920a9e224f2d7cf5","name":"Seiji Niizawa","registered_at":"2026-06-17T06:52:04Z","symbol":"NIM1315402","token_address":"0xa625878134a53506e1bdac29ddcd29868dbfbcb6","type":"artist","uuid":"76997bea-5d6d-4183-acbc-73bb2c1a17ec"}
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 0x39517f624bfb8f7ed0cf2d44b4032583e2e7918f05aee679920a9e224f2d7cf5. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76997bea-5d6d-4183-acbc-73bb2c1a17ec.json and https://artists.proofprofile.net/proofs/artist/76997bea-5d6d-4183-acbc-73bb2c1a17ec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T15:44:10Z
  text: {"copyright_id":"0x39517f624bfb8f7ed0cf2d44b4032583e2e7918f05aee679920a9e224f2d7cf5","name":"Seiji Niizawa","registered_at":"2026-06-17T06:52:04Z","symbol":"NIM1315402","token_address":"0xa625878134a53506e1bdac29ddcd29868dbfbcb6","type":"artist","uuid":"76997bea-5d6d-4183-acbc-73bb2c1a17ec"}
album: Oriental Dream
  type: MusicAlbum
  date published: 2021-10-15
album: Aura
  type: MusicAlbum
  date published: 2021-11-05
album: Konbanwa
  type: MusicAlbum
  date published: 2022-02-11
album: Illusion of Us
  type: MusicAlbum
  date published: 2023-04-21
album: Tenacity Souls
  type: MusicAlbum
  date published: 2024-07-19