Prove what's in a document. Without handing over the document.
To prove you earn enough, you hand over every transaction you have ever made. To prove a levy is paid, you send the whole statement. AT-1 Proofs replaces that with a single shareable link that reveals only what you chose and still proves it is genuine and unaltered. The other side checks it in their own browser, free, with no account.
Start with what you're trying to do
Prove one figure, hide the rest
Drop a statement, invoice, payslip or the original email. Choose what to reveal and share a link. The rest of the document never leaves your device.
Make a proof→Redact it, and prove the rest is untouched
Black out paragraphs in a Word document and hand over a proof that everything you kept is byte-identical to the original. The hidden text is removed, not covered.
Redact a document→Check it yourself
Open the link and it verifies in your own browser. Free, no account, nothing uploaded. If a single value was altered, it refuses.
Check a proof→Ask, without collecting their statement
Send a request link. You get back a verified, redacted proof instead of a full bank statement, so there is nothing sensitive to store.
Request proofs→How one proof travels
- 1. Sealed on your device
Your document is read in your browser. Where it came from is checked, and the fields you pick are sealed. Nothing is uploaded.
- 2. Shared as a link
The proof itself travels in the link. Hidden fields are not in it at all, so there is nothing to leak later.
- 3. Checked by them
The recipient's browser re-does the maths. Genuine passes; altered, invented or removed values fail.
Two kinds of proof, never confused
A proof arrives as one of two clearly different certificates. Source-verified means the document is proven to have genuinely come from the institution that sent it, checked against that institution's own published signature. Self-attested means it is sealed and tamper-evident since you shared it, but where it came from is not proven. They look nothing alike on purpose, so a self-attested proof can never pass for a verified one. For anything fraud-sensitive, ask for source-verified.
Common questions
- Does the person checking my proof need an account?
- No. Checking a proof is free, needs no account, and runs entirely in the recipient's browser. That applies whether they are a landlord, a bank, or a business that has never heard of us.
- Does my document get uploaded?
- No. Reading the document, choosing what to reveal, and sealing the proof all happen in your browser. Only the redacted proof leaves your device, and only when you share the link. The one exception is the optional trustless proof, which uses a proving service that sees the email briefly to produce the proof and then discards it. That is stated on screen before you use it.
- What stops someone editing the figure before sharing it?
- The proof is sealed cryptographically. Changing a revealed value, inventing a line, or removing one breaks the seal and the recipient's browser refuses to verify it. For the strongest tier, the sender's own email signature is proven, so the recipient can confirm the document genuinely came from the named institution without trusting the sender at all.
- What does it cost?
- Checking proofs and creating self-attested proofs are free and need no account. A business that wants unlimited source-verified proofs and a verified inbox pays $99 a month. API access, bulk request links and webhooks are $500 a month.