SERGIO TACCHINI
type: MusicGroup
description: Sergio Tacchini (; born 2 September 1938) is an Italian former professional tennis player and fashion designer of sportswear. The sportswear firm bearing his name is located in Bellinzago Novarese, No
popularity: 20
followers: 86
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x11d3b4f965def2ff6aa9ad0079a0d97b66f4d61cbd7f16b62343b9b90eef27f0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953660
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953660
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/53260d42-fec8-4aea-950e-a4bfa610785f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/53260d42-fec8-4aea-950e-a4bfa610785f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/53260d42-fec8-4aea-950e-a4bfa610785f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T17:20:01Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x11d3b4f965def2ff6aa9ad0079a0d97b66f4d61cbd7f16b62343b9b90eef27f0","name":"SERGIO TACCHINI","registered_at":"2026-06-14T13:16:19Z","symbol":"NIM0464446","token_address":"0x96bcfe189484b4a6107b0dc8f663ea60778d46e7","type":"artist","uuid":"53260d42-fec8-4aea-950e-a4bfa610785f"}
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 0x11d3b4f965def2ff6aa9ad0079a0d97b66f4d61cbd7f16b62343b9b90eef27f0. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53260d42-fec8-4aea-950e-a4bfa610785f.json and https://artists.proofprofile.net/proofs/artist/53260d42-fec8-4aea-950e-a4bfa610785f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T17:20:01Z
  text: {"copyright_id":"0x11d3b4f965def2ff6aa9ad0079a0d97b66f4d61cbd7f16b62343b9b90eef27f0","name":"SERGIO TACCHINI","registered_at":"2026-06-14T13:16:19Z","symbol":"NIM0464446","token_address":"0x96bcfe189484b4a6107b0dc8f663ea60778d46e7","type":"artist","uuid":"53260d42-fec8-4aea-950e-a4bfa610785f"}