50天
type: MusicGroup
genre: j-rock
popularity: 2
followers: 225
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf39b01f04cf589cc67b0c42c481d39210b322fe51862495c51ab9b4d5131ed0b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954705
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954705
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ebd9cd6d-5369-4912-8a9c-70ae5ca9f068.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ebd9cd6d-5369-4912-8a9c-70ae5ca9f068.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ebd9cd6d-5369-4912-8a9c-70ae5ca9f068
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T13:42:37Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf39b01f04cf589cc67b0c42c481d39210b322fe51862495c51ab9b4d5131ed0b","name":"50天","registered_at":"2026-06-21T10:53:32Z","symbol":"NIM1904097","token_address":"0x6dcd1912b2571fce689f649a74d0556b894de138","type":"artist","uuid":"ebd9cd6d-5369-4912-8a9c-70ae5ca9f068"}
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 0xf39b01f04cf589cc67b0c42c481d39210b322fe51862495c51ab9b4d5131ed0b. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebd9cd6d-5369-4912-8a9c-70ae5ca9f068.json and https://artists.proofprofile.net/proofs/artist/ebd9cd6d-5369-4912-8a9c-70ae5ca9f068.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T13:42:37Z
  text: {"copyright_id":"0xf39b01f04cf589cc67b0c42c481d39210b322fe51862495c51ab9b4d5131ed0b","name":"50天","registered_at":"2026-06-21T10:53:32Z","symbol":"NIM1904097","token_address":"0x6dcd1912b2571fce689f649a74d0556b894de138","type":"artist","uuid":"ebd9cd6d-5369-4912-8a9c-70ae5ca9f068"}
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