---
title: "Integrity Service Overview"
description: "Integrity Service's role in storing evidence, policy manifests, certificates, and SDK lineage manifests."
source: "Guardian Platform"
---
Integrity Service supports the trust and evidence layer of the Guardian Platform. Most users encounter it through Guardian lineage, certificate, and evidence workflows rather than by using Integrity Service directly.

## What Integrity Service Provides

- Content-addressed records for governance evidence.
- Lineage graphs, registered by the EQTY SDK, that show how datasets, models, and other assets were produced.
- Policy manifests that summarize the evidence behind a governance claim.
- Compliance certificate issuance support.
- Agent certification credentials and project membership credentials for agents.
- Credential status and revocation support for issued credentials.

## How It Fits with Guardian

Guardian and Governance Service create the user-facing governance workflow. Integrity Service preserves the evidence relationships and signed records that help auditors understand why a credential or certificate was issued.

If Integrity Service is unavailable, existing projects, policies, and controls stay readable, but most governance writes fail: creating projects, creating or applying policies, submitting declarations, reviews, and attachments, exporting reports, and issuing or revoking credentials. Lineage graphs and manifests also fail to load.

## User-Facing Principles

- Evidence should be traceable back to the governance workflow that produced it.
- Certificates should be issued only when the supporting evidence is complete.
- Revoked credentials should no longer be treated as active evidence.
- Lineage should help reviewers understand relationships without exposing implementation internals.

## Related

- [Evidence Records](./evidence-records.mdx) — how evidence references stay stable over time
- [Lineage Graphs](./lineage-graphs.mdx) — the questions a lineage graph helps answer
- [Policy Manifests and Certificates](./policy-manifests-and-certificates.mdx) — manifests, certificates, and revocation
- [Integrity Service Operations](./operations.mdx) — required configuration and health checks
- [Governance Service Overview](../governance-service/overview.mdx) — the service that coordinates credential issuance with Integrity Service