OpenStampsfor industry

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Quick start

From sign-up to your first due-diligence file

Seven steps · about 20 minutes · the same on a computer and a phone · last updated 26 September 2026

A stamp in one sentence. It shows that a file's exact bytes existed inside a time window: no earlier than a public random number was drawn, no later than independent timestamp authorities signed the file's fingerprint. Your file never leaves your device, and a stamp never says the content is true.

  1. Sign in

    Open Account and choose Continue with Google, Continue with Microsoft, or type your work e-mail for a one-time link. There is no password.

    A new account includes up to 21 qualified stamps to try, once per address, with no card. You land on your dashboard: four figures at the top, a Get started list, and the sections down the side (on a phone, along the top — swipe them).

  2. Stamp your first file

    On the dashboard, drop any file on Stamp a file (on a phone, tap it and choose one). Up to 8 MB. The file is fingerprinted on your device; only the fingerprint is sent.

    A few seconds later you get a .cts file. Keep it beside the original — the two together are the evidence. A copy of the stamp is also kept in your journal under Stamps, so a cleared browser loses nothing.

  3. Check a stamp — anyone can

    Open Stamp & verify (or Read a folder for many files at once) and drop the file together with its .cts. The check runs on your device, needs no account, and works offline once the page has loaded. Send the same link to a customer or an auditor: they check it themselves.

    Each line of a reading carries one of five marks:

    • ◆ stamped — a thing exists; nothing was judged.
    • ◇ holds up — checked, and nothing contradicts it. Not a pass, and not a finding that the record is true.
    • ◈ holds up · anchors reached — the same, and every time anchor the reader looked for was reached.
    • ◔ not checked — nothing to check this with. A gap, never a finding against the record.
    • ✕ doesn't hold — checked, and the evidence contradicts the record.
  4. Add your company

    On the dashboard, open Companies → Add a company: legal name, and optionally registry code, EORI and VAT number, and addresses. Typed once, it fills the desk's forms and can be named on your stamps. It is never written into a stamp or a .cts.

  5. Set up a product on the desk

    Open the Desk. Its steps run left to right: Scope · Product · Collect · Assess · Mitigate · Statement · Records.

    In Scope, pick your saved company. In Product, press New product, give it a name and its commodity. The desk then lists what the EUDR file for that product needs. While you are signed in, the desk saves itself to your account and opens on any browser.

  6. Ask a supplier for plot records

    In Collect, open Ask a supplier to capture a plot on their phone. The desk makes a link; send it in your own message — WhatsApp, SMS or e-mail. The farmer or supplier opens it at the plot: no account, no app, and it works with poor signal. Their plot and harvest records come back to your desk. A request stays open for 14 days.

    Supplier requests and replies are counted on your dashboard.

  7. Build the statement and keep the file

    Work through Assess and Mitigate, then Statement. In Records, export the pack you hand to an authority or a customer, and use Save as PDF for the statement and plot sheets.

    EUDR asks you to keep the evidence for five years. The Vault on your dashboard keeps each file beside its stamp, encrypted on your device with a passphrase only you hold. A forgotten passphrase cannot be recovered, so write it down where your company keeps such things.

On your phone

Open the app page on the phone and add OpenStamps to the home screen. The plot page and the checker then open with no signal.

When the trial stamps are used

Stamps still work: they seal on the two free timestamps instead of a qualified one. To keep them qualified, choose a plan or buy a block that never expires under Plan & billing — see Pricing. Prices exclude VAT; Stripe adds it once you enter your billing address, and a business with a valid EU VAT number outside Estonia is invoiced with the reverse charge.

Stuck?

Write to pilot@openstamps.com. A person answers.