Mちゃん
type: MusicGroup
popularity: 10
followers: 13
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8c48fa616fbde3b137a6cb8b89c6b1bbb56145687b741017ac3f717bc69619a6
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/d1cfd910-df59-4274-854b-7f029e3fd92e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d1cfd910-df59-4274-854b-7f029e3fd92e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d1cfd910-df59-4274-854b-7f029e3fd92e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8c48fa616fbde3b137a6cb8b89c6b1bbb56145687b741017ac3f717bc69619a6","name":"Mちゃん","registered_at":"2026-06-21T01:38:34Z","symbol":"NIM1779335","token_address":"0x392e15d7c73c6bc07af8eb719ab29849814eed11","type":"artist","uuid":"d1cfd910-df59-4274-854b-7f029e3fd92e"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c48fa616fbde3b137a6cb8b89c6b1bbb56145687b741017ac3f717bc69619a6. 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/d1cfd910-df59-4274-854b-7f029e3fd92e.json and https://artists.proofprofile.net/proofs/artist/d1cfd910-df59-4274-854b-7f029e3fd92e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x8c48fa616fbde3b137a6cb8b89c6b1bbb56145687b741017ac3f717bc69619a6","name":"Mちゃん","registered_at":"2026-06-21T01:38:34Z","symbol":"NIM1779335","token_address":"0x392e15d7c73c6bc07af8eb719ab29849814eed11","type":"artist","uuid":"d1cfd910-df59-4274-854b-7f029e3fd92e"}
album: ミチノサキ~絆~
  type: MusicAlbum
  date published: 2023-06-28
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  type: MusicAlbum
  date published: 2023-08-31
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  type: MusicAlbum
  date published: 2024-03-27
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  type: MusicAlbum
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  type: MusicAlbum
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