Immutable Evidence Storage

Immutable Evidence Storage

CAVRA now includes deployment references for immutable evidence archives.

Reference Bundles

• examples/immutable-storage/aws-s3-object-lock: S3 Object Lock deployment and upload scripts.
• examples/immutable-storage/azure-blob-immutability: Azure Blob immutability deployment and upload scripts.

How To Use

Generate and verify CAVRA evidence:

cavra evidence bundle --output .cavra/evidence/latest --signer platform-security --retention-days 2555
cavra evidence verify .cavra/evidence/latest --trust-root .cavra/keys/evidence-trust-roots.json --key-id prod-evidence --minimum-retention-days 2555
cavra evidence storage-plan .cavra/evidence/latest --output .cavra/evidence/storage --retention-days 2555

Deploy AWS S3 Object Lock:

cd examples/immutable-storage/aws-s3-object-lock
cp variables.example.env .env
source .env
bash deploy.sh
bash upload-evidence.sh

Deploy Azure Blob immutability:

cd examples/immutable-storage/azure-blob-immutability
cp variables.example.env .env
source .env
bash deploy.sh
bash upload-evidence.sh

Controls

• Verify evidence before upload.
• Use session-scoped object prefixes.
• Keep upload roles separate from retention administration.
• Use AWS S3 Object Lock compliance mode only after records-management review.
• Lock Azure immutability policies only after retention requirements are approved.
• Store cloud upload output with the change record or audit request.

User Stories

• As an auditor, I can confirm CAVRA evidence was retained in a WORM-capable store.
• As a platform engineer, I can deploy immutable storage without granting CAVRA broad cloud permissions.
• As a records manager, I can map CAVRA retention policy artifacts to cloud retention controls.

Enterprise Value

Immutable storage references connect CAVRA's signed evidence bundles to enterprise retention controls. This helps regulated teams prove that AI-agent governance evidence was preserved after review, release, incident response, or audit.

Next

continued release-governance record parity as new evidence metadata kinds are added.