The Authentia Key
Not a certificate.
A permanent key
A paper document is a twelfth-century instrument. The Authentia Key is a system that endures alongside the work itself.
What the Authentia Key contains
- Complete Technical Sheet
- Title, year, technique, dimensions, signature, condition report.
- Archival Images
- Front view, reverse detail and signature, any historical photographs. High resolution for future due diligence.
- Qualified Electronic Signature
- With Qualified Timestamp (QTS). Enforceable in any EU country under arts. 25 and 42 eIDAS.
- Blockchain Hash
- Cryptographic fingerprint anchored on a public distributed ledger. Verification independent of any system.
- NFC Identifier
- Unique ID of the chip physically applied to the work or frame, with anti-cloning asymmetric encryption (NTAG 424 DNA).
- Provenance History
- Registry of ownership transactions, updatable over time. The collector who purchases becomes the new custodian of the documents.
Declaration of Service Nature
This document attests exclusively that the signatory has declared, under their own responsibility… Authentia Arte S.r.l. expresses no judgment on the authenticity, attribution, value, or artistic quality of the work. The service is exclusively documentary and technological in nature.
Frequently Asked Questions
- How long does the certificate last?
- The eIDAS signature is of Long-Term Validation (LTV) type: it remains fully valid and verifiable for decades. The blockchain anchor is immutable and independent. It does not expire.
- Can the NFC chip be removed or cloned?
- The NTAG 424 DNA chip uses AES-128 asymmetric encryption with dynamic keys: every reading produces a different signature, making cloning impossible.
- How does verification work?
- Hold the Authentia Key close to your smartphone. Within 5 seconds your browser will open the verified digital certificate. No app required.
- What happens if the work changes owner?
- The seller transfers the certificate access rights to the new owner. The chain of custody is updated in the cryptographic registry with a certified date.
- Does this document attest to the authorship of the work?
- No. This document attests exclusively that the signatory has declared, under their own responsibility…