Marcos Portugal
type: MusicGroup
description: Marcos António da Fonseca Portugal (24 March 1762 – 17 February 1830), also known as Marco Portogallo in Italian, was a Portuguese-Brazilian classical composer, who achieved great international fame f
popularity: 3
followers: 311
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x17479b47d94ab61372ba6292ab28a74a32a90a9a547edbaede50651ae8141b4c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954689
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954689
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e33ce8eb-1a97-4ba0-ab56-5a447144481e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e33ce8eb-1a97-4ba0-ab56-5a447144481e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e33ce8eb-1a97-4ba0-ab56-5a447144481e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T10:35:31Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x17479b47d94ab61372ba6292ab28a74a32a90a9a547edbaede50651ae8141b4c","name":"Marcos Portugal","registered_at":"2026-06-21T07:12:23Z","symbol":"NIM1859032","token_address":"0x00360b572d3a54eabbb978ca743a04493db3d35e","type":"artist","uuid":"e33ce8eb-1a97-4ba0-ab56-5a447144481e"}
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 0x17479b47d94ab61372ba6292ab28a74a32a90a9a547edbaede50651ae8141b4c. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e33ce8eb-1a97-4ba0-ab56-5a447144481e.json and https://artists.proofprofile.net/proofs/artist/e33ce8eb-1a97-4ba0-ab56-5a447144481e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T10:35:31Z
  text: {"copyright_id":"0x17479b47d94ab61372ba6292ab28a74a32a90a9a547edbaede50651ae8141b4c","name":"Marcos Portugal","registered_at":"2026-06-21T07:12:23Z","symbol":"NIM1859032","token_address":"0x00360b572d3a54eabbb978ca743a04493db3d35e","type":"artist","uuid":"e33ce8eb-1a97-4ba0-ab56-5a447144481e"}
album: Marcos Portugal: Missa Grande (Great Mass)
  type: MusicAlbum
  date published: 2009-11-01
album: Portugal: Matinas do Natal, Rio de Janeiro 1811
  type: MusicAlbum
  date published: 2009-11-09
album: Marcos Portugal: Música Religiosa Publicada no Século XIX
  type: MusicAlbum
  date published: 2019-12-11