Phương Mai
type: MusicGroup
description: Princess Phương Mai of Vietnam, Duchess of Addis Abeba (1 August 1937 – 16 January 2021) was a daughter of Emperor Bảo Đại of Vietnam and his first wife, Empress Nam Phương. In 1947, Nam Phương left V
popularity: 3
followers: 27
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6601919ce02f05f0aa56d4b249f1710c5e1afa3290e9db840584fdaee57b3f3b
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/c1e8a8bc-12f6-49ef-ac4f-6bf308af1ce9.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c1e8a8bc-12f6-49ef-ac4f-6bf308af1ce9.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c1e8a8bc-12f6-49ef-ac4f-6bf308af1ce9
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6601919ce02f05f0aa56d4b249f1710c5e1afa3290e9db840584fdaee57b3f3b","name":"Phương Mai","registered_at":"2026-06-20T19:53:39Z","symbol":"NIM1695942","token_address":"0xe319c756d52916cbca4122710f877cc666e5241c","type":"artist","uuid":"c1e8a8bc-12f6-49ef-ac4f-6bf308af1ce9"}
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 0x6601919ce02f05f0aa56d4b249f1710c5e1afa3290e9db840584fdaee57b3f3b. 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/c1e8a8bc-12f6-49ef-ac4f-6bf308af1ce9.json and https://artists.proofprofile.net/proofs/artist/c1e8a8bc-12f6-49ef-ac4f-6bf308af1ce9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x6601919ce02f05f0aa56d4b249f1710c5e1afa3290e9db840584fdaee57b3f3b","name":"Phương Mai","registered_at":"2026-06-20T19:53:39Z","symbol":"NIM1695942","token_address":"0xe319c756d52916cbca4122710f877cc666e5241c","type":"artist","uuid":"c1e8a8bc-12f6-49ef-ac4f-6bf308af1ce9"}
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