Federico Marchetti
type: MusicGroup
description: Federico Marchetti (; born 7 February 1983) is an Italian former professional footballer who played as a goalkeeper. Marchetti began his professional club career with Torino in 2002, and was subseque
popularity: 3
followers: 6
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7036179db5516ccf20a4594c4edd7c4a9d7ea39ce63634578973858872d7817b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954513
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954513
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9fa4a0e6-a114-44d4-9af1-c3d82c0c5044.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9fa4a0e6-a114-44d4-9af1-c3d82c0c5044.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9fa4a0e6-a114-44d4-9af1-c3d82c0c5044
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T06:31:18Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7036179db5516ccf20a4594c4edd7c4a9d7ea39ce63634578973858872d7817b","name":"Federico Marchetti","registered_at":"2026-06-20T05:13:55Z","symbol":"NIM1522745","token_address":"0x306df660e1bc958899aa3b02d6a1867272f66dff","type":"artist","uuid":"9fa4a0e6-a114-44d4-9af1-c3d82c0c5044"}
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 0x7036179db5516ccf20a4594c4edd7c4a9d7ea39ce63634578973858872d7817b. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9fa4a0e6-a114-44d4-9af1-c3d82c0c5044.json and https://artists.proofprofile.net/proofs/artist/9fa4a0e6-a114-44d4-9af1-c3d82c0c5044.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T06:31:18Z
  text: {"copyright_id":"0x7036179db5516ccf20a4594c4edd7c4a9d7ea39ce63634578973858872d7817b","name":"Federico Marchetti","registered_at":"2026-06-20T05:13:55Z","symbol":"NIM1522745","token_address":"0x306df660e1bc958899aa3b02d6a1867272f66dff","type":"artist","uuid":"9fa4a0e6-a114-44d4-9af1-c3d82c0c5044"}