Contraponto
type: MusicGroup
genre: grindcore
popularity: 2
followers: 511
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8442e3af0956d1dc3e8f74e7d049d32dc8b8e7d0e964b8f8aa0ffcd70e342170
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954002
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954002
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/322d6289-91d2-43fc-a3b4-d883bbafcdf0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/322d6289-91d2-43fc-a3b4-d883bbafcdf0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/322d6289-91d2-43fc-a3b4-d883bbafcdf0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T20:47:12Z
additional property: OTSCanonicalRecord
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 0x8442e3af0956d1dc3e8f74e7d049d32dc8b8e7d0e964b8f8aa0ffcd70e342170. Chain 2 (Bitcoin): anchored in block 954004 (2026-06-16T21:01:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/322d6289-91d2-43fc-a3b4-d883bbafcdf0.json and https://artists.proofprofile.net/proofs/artist/322d6289-91d2-43fc-a3b4-d883bbafcdf0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T21:01:04Z
album: Só a Luta Muda a Vida
  type: MusicAlbum
  date published: 2016-07-07
album: Pagando o Pato
  type: MusicAlbum
  date published: 2018-12-05
album: Alerta Antifascista
  type: MusicAlbum
  date published: 2020-05-19
album: Desespero
  type: MusicAlbum
  date published: 2022-02-04
album: Cruzadas
  type: MusicAlbum
  date published: 2022-09-07
album: Sentimentos Modernos
  type: MusicAlbum
  date published: 2022-10-29
album: Coroa de Chumbo
  type: MusicAlbum
  date published: 2024-07-13
album: Futuro Sem Cor
  type: MusicAlbum
  date published: 2024-11-24