明治大学マンドリン倶楽部
type: MusicGroup
genre: enka
genre: kayokyoku
popularity: 22
followers: 59
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7c0b072197a7d0d66a5f19fd050ef44fb87d3fb3f68098ce29d19e1f0925f426
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f909158e-0361-4e7b-a478-ef1bc7e35bb4.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f909158e-0361-4e7b-a478-ef1bc7e35bb4.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f909158e-0361-4e7b-a478-ef1bc7e35bb4
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7c0b072197a7d0d66a5f19fd050ef44fb87d3fb3f68098ce29d19e1f0925f426","name":"明治大学マンドリン倶楽部","registered_at":"2026-06-12T14:06:41Z","symbol":"NIM0320525","token_address":"0x603ca2e140479e9d66eb1f6f0a011f14a6bcf480","type":"artist","uuid":"f909158e-0361-4e7b-a478-ef1bc7e35bb4"}
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 0x7c0b072197a7d0d66a5f19fd050ef44fb87d3fb3f68098ce29d19e1f0925f426. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f909158e-0361-4e7b-a478-ef1bc7e35bb4.json and https://artists.proofprofile.net/proofs/artist/f909158e-0361-4e7b-a478-ef1bc7e35bb4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x7c0b072197a7d0d66a5f19fd050ef44fb87d3fb3f68098ce29d19e1f0925f426","name":"明治大学マンドリン倶楽部","registered_at":"2026-06-12T14:06:41Z","symbol":"NIM0320525","token_address":"0x603ca2e140479e9d66eb1f6f0a011f14a6bcf480","type":"artist","uuid":"f909158e-0361-4e7b-a478-ef1bc7e35bb4"}