Quantum-Safe · Blockchain-Anchored

Your Invention.
Your Priority Date.

Register prior art with an immutable timestamp on the QAN blockchain and receive a verifiable PDF certificate — in seconds.

Register Claim

Verify Certificate

History

Prior Art Registration

Claim strength — based on your wallet's verified identity (QIDENT)

Current

L0 — Anonymous

No Wallet

Hash on-chain only — the claim belongs to whoever holds the original file.

Suitable for: Defensive publication · Anonymous prior art

Current

L1 — Email

Email Verified

QIDENT L1 — wallet linked to a verified email address. Basic identity proof.

Suitable for: Personal inventor records · Quick IP baseline

Current

L2 — Domain

Domain Verified

QIDENT L2 — wallet linked to a verified domain via DNS TXT record.

Suitable for: Startup IP · Open source ownership · Company claims

Current

L3 — Organisation

Org Verified

QIDENT L3 — wallet linked to a verified organisation (GLEIF/LEI).

Suitable for: Corporate prior art · Trade secrets · Patent filings

Current

L4 — eIDAS

Gov-ID Verified

QIDENT L4 — wallet linked via government-issued eIDAS credential. Strongest evidentiary value.

Suitable for: Regulatory evidence (EU MDR, FDA) · Patent office submissions · Legal proceedings

Title *

Description (optional)

Public URL (optional)

Where the document is publicly accessible. Stored on-chain in the event log.

Valid Until (optional)

Optional expiration date. The blockchain proof itself never expires.

Document

📄

Select file or drag here

Any file format · only the hash ever leaves your browser

Only the SHA3-256 hash is written on-chain — file content never leaves the service.

Want a verified submitter badge on your certificate? Register your wallet identity with QIDENT →

Anchoring on blockchain...

What is QPRIOR?

QPRIOR registers prior art claims with an immutable, quantum-safe timestamp on the QAN Blockchain. Prove that your invention, design, or idea existed at a specific point in time — without revealing the content itself.

Use it for patent prior art, trade secrets, research data, design files, or any intellectual property you want to timestamp. A downloadable PDF certificate is issued for each claim.

Setup

Follow the QAN Testnet Setup Guide to get started. You will need:

MetaMask — Browser wallet (metamask.io)
QAN Testnet network — Click "Connect Wallet" on this page to add it automatically, or configure manually via the setup guide.
Test QANX — Free testnet tokens for gas fees from the QAN Faucet.

How to Register

Connect your wallet (top right)
Select a file or paste a SHA3-256 hash directly
Add a title and optional description for your claim
Click Register & Issue Certificate — the hash is written on-chain and a PDF certificate is generated

Important: The file never leaves your browser. Only the SHA3-256 hash goes on-chain. Title and description are stored off-chain in the service database — they are not written to the blockchain.

Domain Verification (Trust Level)

Optionally link your domain to your wallet address to increase the trust level of your claims.

Add a DNS TXT record to _qprior.yourdomain.com
Set the value to: v=qprior1 address=0xYourWalletAddress
The service will verify the record and display a domain badge on your claims

This proves that the wallet owner controls the domain — adding organizational credibility to your prior art claims.

Version History

Update existing prior art claims by referencing the original hash. Each update creates a new on-chain record linked to the original, preserving the full version chain.

Switch to Update Claim mode
Select the original claim from your history
Select the updated file or paste the new hash
Submit — the new version is linked on-chain to the original

The complete version history is visible in verification and on the PDF certificate.

Verify

Anyone can verify a prior art claim by hash — no wallet needed.

Switch to the Verify tab
Paste the document hash (with or without 0x prefix)
Click Verify — see the on-chain proof: TX hash, block number, timestamp, and claimant address

The PDF certificate is downloadable from the verification result. Share it with patent offices, legal teams, or business partners.

.qan Names

Instead of showing raw hex addresses, register a human-readable name like yourname.qan on QIDENT. Once registered, your .qan name appears on all QPRIOR claims and certificates — making them easier to identify and trust.

Privacy by Design
All hashing happens in your browser. Your files are never uploaded or stored. Only the SHA3-256 hash (a fixed-length fingerprint) goes on-chain — the original content cannot be reconstructed from it. Title and description metadata are stored off-chain and never touch the blockchain.

Post-Quantum Security
SHA3-256 hashing (NIST FIPS 202) + CRYSTALS-Dilithium block signing (NIST FIPS 204) on QAN Blockchain. Your prior art timestamps remain verifiable even after quantum computers become available.