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Paper Trail / Receipts for AI systems

Your AI did something.
Keep the receipt.

When someone asks what your AI system did, Paper Trail gives you a record you can actually check.

See the plan. See the price. Buy in Stripe. Your paid account is created from the verified purchase.

See plans and prices →
For teams building or running AI systemsEvidence, not a compliance certificate

01 / The proof object

Anatomy of the runtime flow. It illustrates the fields and boundaries Paper Trail actually uses, not a fabricated customer event.

The receipt is
the interface.

Paper Trail / Receipt anatomyExample structure / Not a live event
01 / Action

Something happened.

A connected system sends bounded content with an idempotency key and, when useful, a trace reference.

content
bounded event
trace ref
optional
idempotency
required
02 / Attest

Keep the evidence.

Paper Trail captures the attestation at a declared boundary such as egress or publication and records when it was attested.

capture point
egress / publication
attested at
timestamped
record
checkable later
03 / VerifyCheckable

Ask the record.

Verification is a separate operation. You do not ask the model that produced the work to vouch for its own evidence.

The boundary

Action ≠ receipt ≠ verdict.

Evidence without model self-attestationProduct truth / runtime contract

02 / Why it exists

Logs tell you a lot.
They do not always give you a receipt.

AI systems can make decisions, generate work and trigger actions quickly. Later, the simple questions get harder: What happened? When? Which system did it? Can we trust the record? Paper Trail is built for those questions.

What should an AI audit trail record? →

/01

Record what happened.

When your connected AI system does something, Paper Trail creates a record while it is happening.

/02

Make the record checkable.

The record gets its own cryptographic reference so you can check later that the evidence has not quietly changed.

/03

Bring the receipt.

Use the saved evidence when a customer, teammate, auditor or reviewer asks what happened. Paper Trail provides the record, not the legal conclusion.

03 / What it does not do

A receipt.
Not a verdict.

It does not decide whether something was human-made or AI-made.

It does not certify that your company is compliant with a law or regulation.

It does not ask an AI model to vouch for its own evidence.

It helps you show your work.

04 / Pricing

Here’s the product.
Here’s the price.

Pick the amount of Paper Trail you need. The buy button opens Stripe immediately. No account setup before payment.

Starter

$49

CAD / month

  • 100k recorded events / month
  • 3 connected AI systems
  • Verification included
  • Checkable evidence references
  • Annual: $490 CAD

Pro

$199

CAD / month

  • 1M recorded events / month
  • 20 connected AI systems
  • Verification included
  • Checkable evidence references
  • Annual: $1,990 CAD

Scale

$799

CAD / month

  • 10M recorded events / month
  • 100 connected AI systems
  • Verification included
  • Checkable evidence references
  • Annual: $7,990 CAD

All prices are CAD. Stripe handles payment. Verified billing state creates durable access even if you close the browser.

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