Trần Hiếu
type: MusicGroup
description: thumb|Trần Hiếu in 2012 NSND Trần Hiếu (23 April 1936) is a Vietnamese classical singer.NSND Trần Hiếu 76 tuổi vẫn “trai tráng” June 2012Three decades of song to be marked 2011 "People's Artist Tran
popularity: 7
followers: 329
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1d508c5edd2f3297e2ab258d8e15219cb5559b1b04eb7cd63c94953ba70b6c6a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954693
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954693
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e7e864aa-a119-498c-be1a-714d259db820.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e7e864aa-a119-498c-be1a-714d259db820.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e7e864aa-a119-498c-be1a-714d259db820
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T11:50:32Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1d508c5edd2f3297e2ab258d8e15219cb5559b1b04eb7cd63c94953ba70b6c6a","name":"Trần Hiếu","registered_at":"2026-06-21T09:03:19Z","symbol":"NIM1883179","token_address":"0x6345a6d14cbfba2f2b56eb90a79796b511b45fda","type":"artist","uuid":"e7e864aa-a119-498c-be1a-714d259db820"}
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 0x1d508c5edd2f3297e2ab258d8e15219cb5559b1b04eb7cd63c94953ba70b6c6a. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7e864aa-a119-498c-be1a-714d259db820.json and https://artists.proofprofile.net/proofs/artist/e7e864aa-a119-498c-be1a-714d259db820.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T11:50:32Z
  text: {"copyright_id":"0x1d508c5edd2f3297e2ab258d8e15219cb5559b1b04eb7cd63c94953ba70b6c6a","name":"Trần Hiếu","registered_at":"2026-06-21T09:03:19Z","symbol":"NIM1883179","token_address":"0x6345a6d14cbfba2f2b56eb90a79796b511b45fda","type":"artist","uuid":"e7e864aa-a119-498c-be1a-714d259db820"}
album: Giọng Ca Trần Hiếu
  type: MusicAlbum
  date published: 2018-08-22
album: Còn Lại Với Thời Gian
  type: MusicAlbum
  date published: 2021-03-01