Yasuo Watani
type: MusicGroup
genre: japanese classical
description: Yasuo Watani (born in 1960) is a Japanese chromatic harmonica player. He was born in Kyoto, Japan and had his first harmonica lessons with Tadao Kobayashi in 1966. After graduating from Doshisha Unive
popularity: 2
followers: 72
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc114b4b0b1e454e7ff37ae490beb1bf3399b56694b0dea127a7f6f64c8b5d09b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bf1c4ac2-81f7-4871-947d-a49682a5d843.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bf1c4ac2-81f7-4871-947d-a49682a5d843.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/bf1c4ac2-81f7-4871-947d-a49682a5d843
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc114b4b0b1e454e7ff37ae490beb1bf3399b56694b0dea127a7f6f64c8b5d09b","name":"Yasuo Watani","registered_at":"2026-06-20T18:42:02Z","symbol":"NIM1679528","token_address":"0x72e54c1782571ae5914f4bfc5da86551bd7d113f","type":"artist","uuid":"bf1c4ac2-81f7-4871-947d-a49682a5d843"}
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 0xc114b4b0b1e454e7ff37ae490beb1bf3399b56694b0dea127a7f6f64c8b5d09b. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf1c4ac2-81f7-4871-947d-a49682a5d843.json and https://artists.proofprofile.net/proofs/artist/bf1c4ac2-81f7-4871-947d-a49682a5d843.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0xc114b4b0b1e454e7ff37ae490beb1bf3399b56694b0dea127a7f6f64c8b5d09b","name":"Yasuo Watani","registered_at":"2026-06-20T18:42:02Z","symbol":"NIM1679528","token_address":"0x72e54c1782571ae5914f4bfc5da86551bd7d113f","type":"artist","uuid":"bf1c4ac2-81f7-4871-947d-a49682a5d843"}