張怡然
type: MusicGroup
genre: chinese indie
genre: chinese rock
popularity: 12
followers: 109
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa1409ac4ad460b38df3d0f61a4e01e4c732de6158023b8a92307059b7d511f86
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953694
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953694
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6cd9025c-b997-4ba0-8db9-ae0494fa9cf5.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6cd9025c-b997-4ba0-8db9-ae0494fa9cf5.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/6cd9025c-b997-4ba0-8db9-ae0494fa9cf5
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T21:38:09Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa1409ac4ad460b38df3d0f61a4e01e4c732de6158023b8a92307059b7d511f86","name":"張怡然","registered_at":"2026-06-14T15:55:47Z","symbol":"NIM0502501","token_address":"0x4a43c383c9d4f61d5b33d1c2652cf02474bb89cc","type":"artist","uuid":"6cd9025c-b997-4ba0-8db9-ae0494fa9cf5"}
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 0xa1409ac4ad460b38df3d0f61a4e01e4c732de6158023b8a92307059b7d511f86. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6cd9025c-b997-4ba0-8db9-ae0494fa9cf5.json and https://artists.proofprofile.net/proofs/artist/6cd9025c-b997-4ba0-8db9-ae0494fa9cf5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T21:38:09Z
  text: {"copyright_id":"0xa1409ac4ad460b38df3d0f61a4e01e4c732de6158023b8a92307059b7d511f86","name":"張怡然","registered_at":"2026-06-14T15:55:47Z","symbol":"NIM0502501","token_address":"0x4a43c383c9d4f61d5b33d1c2652cf02474bb89cc","type":"artist","uuid":"6cd9025c-b997-4ba0-8db9-ae0494fa9cf5"}