Francisco Ferreras
type: MusicGroup
description: Francisco Rodriguez, better known as Francisco 'Pipin' Ferreras (born January 18, 1962) is a Cuban free-diver known for his achievements in deep free diving and his relationship with his wife, Audrey
popularity: 13
followers: 1
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0178f3d50a591480b013a80b4b9ab780f938e745faf3c92a34f188783b793af5
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953817
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953817
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f7f9dc14-ff95-45d8-8025-fdafc4738da2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f7f9dc14-ff95-45d8-8025-fdafc4738da2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f7f9dc14-ff95-45d8-8025-fdafc4738da2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T18:10:31Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x0178f3d50a591480b013a80b4b9ab780f938e745faf3c92a34f188783b793af5","name":"Francisco Ferreras","registered_at":"2026-06-15T06:34:39Z","symbol":"NIM0712231","token_address":"0x7e955c583d71b0569173f7082cb59e4daacfb5f5","type":"artist","uuid":"f7f9dc14-ff95-45d8-8025-fdafc4738da2"}
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 0x0178f3d50a591480b013a80b4b9ab780f938e745faf3c92a34f188783b793af5. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7f9dc14-ff95-45d8-8025-fdafc4738da2.json and https://artists.proofprofile.net/proofs/artist/f7f9dc14-ff95-45d8-8025-fdafc4738da2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T18:10:31Z
  text: {"copyright_id":"0x0178f3d50a591480b013a80b4b9ab780f938e745faf3c92a34f188783b793af5","name":"Francisco Ferreras","registered_at":"2026-06-15T06:34:39Z","symbol":"NIM0712231","token_address":"0x7e955c583d71b0569173f7082cb59e4daacfb5f5","type":"artist","uuid":"f7f9dc14-ff95-45d8-8025-fdafc4738da2"}