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Prove

Show one decision without showing anything else

Share a link that lets anyone check a single decision against our published keys, offline.

Get startedSee pricing →
xevrion.co.uk / proof / d_7f3a91Example data

Shared decision

No sign-in needed
Action
refund.issue · £540
Decision
Approved by 2 of 2
Decided
26 Oct 2026, 10:44 UTC
Policy
refunds v12
Hidden
Customer name, order contents

Checked in your browser

Offline
  1. Receipt signature matchesed25519
  2. Included in the logleaf 48,211
  3. Checkpoint signed#9,402
  4. Link not revoked

Why it matters

What public proof changes

  • One link shows a single decision.
  • Anyone checks it against published keys, offline.
  • You can revoke the link whenever you like.
  • Showing an auditor means screenshots and trust.
  • Records can be edited after the fact.
  • Checking needs access to your systems.

The resultProof without handing over access.

What you get

Public proof, in practice

  • Nothing else revealed

    The check covers one decision. The rest of your log stays private.

  • Offline check

    In a browser, or with a few lines of code. No call to us needed.

  • Revocable links

    Switch a share link off whenever you like.

How it works

Step by step

  1. 1

    Decision finished

    A person signs it off.

  2. 2

    Added to the log

    Chained to the entry before it.

  3. 3

    Share a link

    Send it to an auditor or customer.

  4. 4

    They verify

    The maths either holds or it does not.

Questions

About public proof

Do I need to trust Xevrion?

No. The proof is checked with public keys and open maths, not with our word.

What standard is the log built on?

An append-only Merkle log in the style of RFC 6962, with Ed25519-signed checkpoints.

Next

Works well with

Know what your agents did.

Start free. Guard your first agent in a few minutes, and keep a record anyone can check.

Get started freeSee pricing →
  • Free plan, no card
  • Signed, chained decisions
  • Checked offline, without us