Tsutomu Sakamoto
type: MusicGroup
genre: enka
genre: kayokyoku
description: (born 3 August 1962) is a racing cyclist from Japan. He competed for Japan in the 1984 Summer Olympics held in Los Angeles, United States in the individual sprint event, where he finished in third pl
popularity: 2
followers: 139
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x040eb3872596ab7f70d657874a65aabcd309b25d6ec73c2cc0552d2174bc683a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/528a9767-4066-47dd-9ae5-2d20f8f1ba38.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/528a9767-4066-47dd-9ae5-2d20f8f1ba38.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/528a9767-4066-47dd-9ae5-2d20f8f1ba38
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x040eb3872596ab7f70d657874a65aabcd309b25d6ec73c2cc0552d2174bc683a","name":"Tsutomu Sakamoto","registered_at":"2026-06-16T18:24:05Z","symbol":"NIM1136914","token_address":"0x289fe442c284ebe3269f43183461ef586bdc6a8d","type":"artist","uuid":"528a9767-4066-47dd-9ae5-2d20f8f1ba38"}
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 0x040eb3872596ab7f70d657874a65aabcd309b25d6ec73c2cc0552d2174bc683a. 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/528a9767-4066-47dd-9ae5-2d20f8f1ba38.json and https://artists.proofprofile.net/proofs/artist/528a9767-4066-47dd-9ae5-2d20f8f1ba38.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x040eb3872596ab7f70d657874a65aabcd309b25d6ec73c2cc0552d2174bc683a","name":"Tsutomu Sakamoto","registered_at":"2026-06-16T18:24:05Z","symbol":"NIM1136914","token_address":"0x289fe442c284ebe3269f43183461ef586bdc6a8d","type":"artist","uuid":"528a9767-4066-47dd-9ae5-2d20f8f1ba38"}
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