AIBlockchain

Prove your invoice was never altered

Create tamper-proof evidence for every invoice and financial document — in seconds.

For: Accounting, finance, audit, procurement

Free to try · no signup
  1. 1 Enter information
  2. 2 Digital proof
  3. 3 Verify

Fill in the sample fields below (examples are pre-filled — adjust freely).

Technical details

The data is canonicalized (deterministic key sorting) then hashed with keccak256 into a 32-byte code (bytes32). That code plus a timestamp is written to the xAISandboxRegistry smart contract on Base Sepolia via a server-side relayer (no keys exposed to the user). Verification re-hashes the current data and compares it to the stored code.

How it works

  1. 1

    Enter invoice details

    Invoice number, tax ID, total, issue date.

  2. 2

    Seal the proof

    The system creates a fingerprint and stores it permanently on a public ledger.

  3. 3

    Try verifying

    Change one character to watch the system catch the forgery instantly.

The problem you face

  • E-invoices can have amounts or tax IDs edited after sending, hard for the recipient to catch.
  • In a dispute, it is hard to prove which version is the original and which was tampered with.
  • Internal storage still risks insider edits that leave no trace.

What you gain

  • Undeniable evidence. Every invoice gets a timestamped digital proof, usable for reconciliation or disputes.
  • Instant tamper detection. Change a single character and the system flags it at once — no expert needed.
  • Fully private. Invoice content is never published; only the fingerprint is stored for comparison.

Real-world scenario

Supplier & accounting team

A supplier issues a 500M VND invoice and seals the proof at issuance. A month later the buyer receives a 550M version. In seconds, accounting compares it to the original proof and proves the invoice was altered — avoiding loss and a drawn-out dispute.

Frequently asked questions

Do I need a crypto wallet or coins?

No. You just enter information as usual; the system handles all the technical parts.

Is my invoice content made public?

No. Only a “digital fingerprint” is public; the original content cannot be reverse-engineered from it.

How long does the proof last?

Permanently on the public ledger — no one can delete or edit it later.

Other tools

Fund Disbursal & Supply Chain Core KYC & Credit Profile