Carlos Ferreira
type: MusicGroup
description: Carlos Ferreira may refer to: Carlos Amaral Ferreira, Portuguese Paralympic athlete Carlos Ferreira (sailor) (born 1931), Portuguese former sailor Carlos Vaz Ferreira (1872–1958), Uruguayan philos
popularity: 3
followers: 127
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf3cbd911902fd2c6566a479d1e78ae4d3718fd32e85961f12eb60550773092a2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954058
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954058
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/456c464b-b78c-4842-83bc-401fa34c89ea.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/456c464b-b78c-4842-83bc-401fa34c89ea.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/456c464b-b78c-4842-83bc-401fa34c89ea
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T06:34:31Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf3cbd911902fd2c6566a479d1e78ae4d3718fd32e85961f12eb60550773092a2","name":"Carlos Ferreira","registered_at":"2026-06-16T13:45:25Z","symbol":"NIM1070419","token_address":"0x6b9997a280273077e227e1a6f6b25811f0f02246","type":"artist","uuid":"456c464b-b78c-4842-83bc-401fa34c89ea"}
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 0xf3cbd911902fd2c6566a479d1e78ae4d3718fd32e85961f12eb60550773092a2. Chain 2 (Bitcoin): anchored in block 954058 (2026-06-17T06:34:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/456c464b-b78c-4842-83bc-401fa34c89ea.json and https://artists.proofprofile.net/proofs/artist/456c464b-b78c-4842-83bc-401fa34c89ea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T06:34:31Z
  text: {"copyright_id":"0xf3cbd911902fd2c6566a479d1e78ae4d3718fd32e85961f12eb60550773092a2","name":"Carlos Ferreira","registered_at":"2026-06-16T13:45:25Z","symbol":"NIM1070419","token_address":"0x6b9997a280273077e227e1a6f6b25811f0f02246","type":"artist","uuid":"456c464b-b78c-4842-83bc-401fa34c89ea"}
album: XX-XXI
  type: MusicAlbum
  date published: 2023-10-16