Audit Evidence Framework

Audit Evidence Framework

The Audit Evidence Framework is the backbone of the CMMC AI Compliance Platform, ensuring that every compliance claim is backed by verifiable, machine-readable artifacts.

Evidence Lifecycle

1. Identification: Agents identify technical requirements within a CMMC control.
2. Harvesting: MCP-enabled agents pull relevant logs, configurations, or screenshots from the target environment.
3. Validation: The platform validates the evidence against the evidence_schema.json to ensure all required fields are present.
4. Mapping: Evidence is cryptographically linked to a specific control and assessment record.
5. Storage: Artifacts are stored in a secure, audit-ready repository with immutable versioning.

Machine-Readable Evidence Schema

The evidence_schema.json defines a unified format for all compliance artifacts.

{
  "evidence_id": "EV-2026-001",
  "control_id": "AC.L1-3.1.1",
  "type": "log_snippet",
  "source": "AWS_CloudWatch",
  "timestamp": "2026-03-27T10:00:00Z",
  "data": {
    "log_group": "/aws/lambda/access_control",
    "content": "..."
  },
  "metadata": {
    "integrity_hash": "sha256-...",
    "collector_agent": "harvest_agent_01"
  }
}

Evidence Harvesting via MCP Tools

The platform provides specialized tools for agents to submit evidence metadata.

• upload_evidence: Attaches metadata and a reference to an external artifact.
• get_evidence_for_control: Retrieves all linked evidence for a specific CMMC control.
• validate_evidence_package: Runs a check to ensure the evidence package meets auditor requirements.

Automated Mapping Logic

The Evidence Orchestrator uses a mapping engine to automatically associate technical outputs with CMMC controls. For example, a "Pass" result from an automated IAM configuration check is automatically mapped to IA.L1-3.5.1 (Identification & Authentication).

Audit-Ready Exports

When an auditor requests proof of compliance, the platform can generate a Narrative SSP that includes:

• The control description.
• The organization's implementation statement.
• Embedded links to specific evidence artifacts that prove the implementation.

Security & Integrity

All evidence artifacts are hashed upon collection. Any subsequent modification to the evidence or its metadata will trigger a "Tamper Alert" on the compliance dashboard, ensuring the integrity of the audit trail.