Trio de Ouro
type: MusicGroup
description: Trio de Ouro (Gold Trio) was a Brazilian vocal group formed by Herivelto Martins in 1937. They performed regularly at the Cassino da Urca. The trio was composed of two men and one woman, who, through
popularity: 2
followers: 14
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x156626bd737e216f13bd8fb48047c72ab892fb5af395b28e134b732deb5a59bf
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953899
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953899
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/129fb0b4-30fe-4b1b-a987-f2cd160b3be8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/129fb0b4-30fe-4b1b-a987-f2cd160b3be8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/129fb0b4-30fe-4b1b-a987-f2cd160b3be8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T06:37:25Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x156626bd737e216f13bd8fb48047c72ab892fb5af395b28e134b732deb5a59bf","name":"Trio de Ouro","registered_at":"2026-06-15T19:59:20Z","symbol":"NIM0815950","token_address":"0xbdc35f70090a6eca4e637bc7af81d41d442590b6","type":"artist","uuid":"129fb0b4-30fe-4b1b-a987-f2cd160b3be8"}
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 0x156626bd737e216f13bd8fb48047c72ab892fb5af395b28e134b732deb5a59bf. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/129fb0b4-30fe-4b1b-a987-f2cd160b3be8.json and https://artists.proofprofile.net/proofs/artist/129fb0b4-30fe-4b1b-a987-f2cd160b3be8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T06:37:25Z
  text: {"copyright_id":"0x156626bd737e216f13bd8fb48047c72ab892fb5af395b28e134b732deb5a59bf","name":"Trio de Ouro","registered_at":"2026-06-15T19:59:20Z","symbol":"NIM0815950","token_address":"0xbdc35f70090a6eca4e637bc7af81d41d442590b6","type":"artist","uuid":"129fb0b4-30fe-4b1b-a987-f2cd160b3be8"}