---
title: "Evidence Locker for Cloud and AI Systems | PolicyCortex"
description: "Hash-chained evidence of what your cloud was, what changed it, and what your AI was allowed to do. Kept in your tenant. Built for ATO, CMMC, and FedRAMP."
url: https://policycortex.com
sealed: 2026-09-01
amended: 2026-09-02
register: home
records: 6
digest: sha3:65e092e60d48571699d38b4c8f56ed3ac50dea587773a3ea7a4237027fc806e4
---

# An evidence locker for systems that act without you.

Compliance evidence for cloud and AI systems, kept in your tenant.

PolicyCortex records what your cloud was, what changed it, and what your machines were allowed to do. Inside your tenant. Hash chained. Gaps declared, not hidden.

[Verify in your tenant](https://policycortex.com/contact)

Read only. Fourteen days. No sales call.

## Three things you will be asked to prove.

### Proof of state

PROOF 01 / STATE

What was true in your environment, as of a date somebody else picks. Not what is true now. Not a dashboard. A record of a moment, assembled from the environment itself, that a second person can check without your help.

[Read the layer](https://policycortex.com/proof/state)

### Proof of change

PROOF 02 / CHANGE

Who or what changed it, under what authority, and whether the record of that change can be edited after the fact. Most organizations can answer the first part. Almost none can answer the third.

[Read the layer](https://policycortex.com/proof/change)

### Proof of agency

PROOF 03 / AGENCY

What the machine was permitted to do, what it actually did, and what would have stopped it. When an agent acts at two in the morning, the log line saying it happened is not the answer to the question you will be asked.

[Read the layer](https://policycortex.com/proof/agency)

![The PolicyCortex evidence package export: assessor-ready ZIP with complete evidence inventory, validation results, POA&M items, SSP, SAR, OSCAL and eMASS formats, and AES-256 protection](https://policycortex.com/images/pcx-evidence-package-export-1600.webp)

Exhibit H-1 · the assessor-ready package all three proofs ship in: inventory, validations, POA&M, SSP, SAR. One ZIP, hash chained, AES-256 protected. Illustrative demo data; the interface is real.

## Five questions the evidence must answer.

1. Your assessor asks for the configuration as of a date three months back. Can you produce it, or can you only produce today?
2. An agent took an action overnight. Can you show the policy decision that permitted it, or only the record that it happened?
3. Your collector was down for six hours. Does your evidence say so, or does it just have fewer rows?
4. Someone with administrator rights can edit your audit table. What in your architecture makes that detectable?
5. You are asked whether an AI system in your environment is in scope. Who answers, and from what data?

[Request verification](https://policycortex.com/contact)

## It runs where your data already is.

PolicyCortex evaluates policy, collects evidence and gates autonomous action inside your tenant. Nothing about your environment leaves it for us to work. There is no telemetry pipeline pointed at our servers, because a company whose product is proof should not be asking you to trust an outbound connection.

[Read the architecture, written for the person whose job is to disbelieve it](https://policycortex.com/architecture)

## Five questions with answers on record.

**Q: What is PolicyCortex?**
A: PolicyCortex is an evidence locker for cloud and AI systems in regulated environments: it records what the environment was, what changed it, and what machines were allowed to do, hash chained inside the customer's tenant, so an assessor can verify it without trusting the vendor.

**Q: Does PolicyCortex make us compliant?**
A: No. It produces the records compliance decisions rest on. The authorizing official, the C3PAO, or the accountable official makes the determination; PolicyCortex hands them evidence they can recompute instead of a narrative they have to believe.

**Q: Where does the data live?**
A: In your own tenant. There is no telemetry pipeline to PolicyCortex servers and no egress of evidence.

**Q: How is evidence verified?**
A: By recomputation. Every record is SHA3-256 hashed over its content plus the digest of the record before it. Export the stream, recompute, compare: intact, or the exact sequence number where integrity fails. No PolicyCortex account or API is needed.

**Q: What happens when a collector is down?**
A: The chain carries a declared gap: the stream, the interval, the reason, and when it was declared. Evidence never silently has fewer rows.

## We are not for everyone.

If you need a checklist and a score, there are good products for that and we will point you at them. If you are accountable for what an autonomous system does in a regulated environment, and you have already worked out that logs and evidence are different words, [request verification access](https://policycortex.com/contact).

## Register colophon

| Seq | Label | SHA3-256 | Prev |
|---|---|---|---|
| REC 0000 | Genesis | 268f6dae680f | a32090232926 |
| REC 0001 | The three layers | e6108b6e82fe | 268f6dae680f |
| REC 0002 | The filter | bd6acb74e0df | e6108b6e82fe |
| REC 0003 | The boundary | bdbb0e47b6fe | bd6acb74e0df |
| REC 0004 | Questions | 3baca74297d5 | bdbb0e47b6fe |
| REC 0005 | The honest note | 65e092e60d48 | 3baca74297d5 |

Head sha3:65e092e60d48571699d38b4c8f56ed3ac50dea587773a3ea7a4237027fc806e4. Each digest is SHA3-256 over the previous digest, the register key, the record label, and the record copy; a second party can recompute it from this document.