Marco Antonio Fernández
type: MusicGroup
genre: folklore argentino
genre: tango
popularity: 3
followers: 161
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x945b91a6fc24da69f816dad0a3c1930feebc913efbf0a54e19a334cb6332feda
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954587
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954587
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ba43123c-995e-4efd-af22-c3d2799ddadb.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ba43123c-995e-4efd-af22-c3d2799ddadb.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ba43123c-995e-4efd-af22-c3d2799ddadb
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T19:10:41Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x945b91a6fc24da69f816dad0a3c1930feebc913efbf0a54e19a334cb6332feda","name":"Marco Antonio Fernández","registered_at":"2026-06-20T16:25:56Z","symbol":"NIM1653745","token_address":"0x4d79f1145944c1df3b0bbceb80e9772b43d33fe3","type":"artist","uuid":"ba43123c-995e-4efd-af22-c3d2799ddadb"}
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 0x945b91a6fc24da69f816dad0a3c1930feebc913efbf0a54e19a334cb6332feda. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba43123c-995e-4efd-af22-c3d2799ddadb.json and https://artists.proofprofile.net/proofs/artist/ba43123c-995e-4efd-af22-c3d2799ddadb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T19:10:41Z
  text: {"copyright_id":"0x945b91a6fc24da69f816dad0a3c1930feebc913efbf0a54e19a334cb6332feda","name":"Marco Antonio Fernández","registered_at":"2026-06-20T16:25:56Z","symbol":"NIM1653745","token_address":"0x4d79f1145944c1df3b0bbceb80e9772b43d33fe3","type":"artist","uuid":"ba43123c-995e-4efd-af22-c3d2799ddadb"}
album: Tango y Criollismo
  type: MusicAlbum
  date published: 2013-10-30
album: Nunca Tuvo Novio
  type: MusicAlbum
  date published: 2019-07-27