# Edge receipt-ledger blueprint

Status: first-party architecture blueprint. This is not a deployed or verified third-party integration.

This track shows how an edge application can create a receipt, independently verify it, then retain only a minimal audit index such as the receipt `payloadHash`, outcome, engine version and application-owned timestamp.

## Required controls

1. Verify the receipt before recording its index.
2. Do not store secrets, wallet recovery material or unnecessary customer data.
3. Make retention, deletion and access rules explicit.
4. Separate the application timestamp from the caller-supplied observation time.
5. Publish a reproducible demo and sample receipt before requesting verified status.

## Boundary

A database record does not make caller-supplied evidence independently true. This blueprint does not claim a deployed customer integration, trusted timestamp authority or on-chain settlement.