Marcão
type: MusicGroup
description: Marcão is an augmentative name meaning Elder Marcos or Elder Marco. Notable people known by this name include: Marcão Britto (born 1970), full name Marco Antônio Valentim Britto Júnior, guitarist o
popularity: 3
followers: 128
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x96aaacbb3523905a9c709d56291a5ec008d600a8cd6c8a9a7a472a6034e90bf4
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4b1306c8-b7d6-41d4-8e9f-77b1fcafdf0b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4b1306c8-b7d6-41d4-8e9f-77b1fcafdf0b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4b1306c8-b7d6-41d4-8e9f-77b1fcafdf0b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x96aaacbb3523905a9c709d56291a5ec008d600a8cd6c8a9a7a472a6034e90bf4","name":"Marcão","registered_at":"2026-06-16T15:44:17Z","symbol":"NIM1098799","token_address":"0xe889fbe609d0dfd34b07c1e1ea64233de32bb96a","type":"artist","uuid":"4b1306c8-b7d6-41d4-8e9f-77b1fcafdf0b"}
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 0x96aaacbb3523905a9c709d56291a5ec008d600a8cd6c8a9a7a472a6034e90bf4. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b1306c8-b7d6-41d4-8e9f-77b1fcafdf0b.json and https://artists.proofprofile.net/proofs/artist/4b1306c8-b7d6-41d4-8e9f-77b1fcafdf0b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x96aaacbb3523905a9c709d56291a5ec008d600a8cd6c8a9a7a472a6034e90bf4","name":"Marcão","registered_at":"2026-06-16T15:44:17Z","symbol":"NIM1098799","token_address":"0xe889fbe609d0dfd34b07c1e1ea64233de32bb96a","type":"artist","uuid":"4b1306c8-b7d6-41d4-8e9f-77b1fcafdf0b"}
album: Antes Dava Nada
  type: MusicAlbum
  date published: 2021-06-03
album: Faz De Conta
  type: MusicAlbum
  date published: 2023-04-27
album: Te amo Te odeio
  type: MusicAlbum
  date published: 2024-06-06
album: Tô Gostando disso aqui
  type: MusicAlbum
  date published: 2025-06-13