# title
Outbound Webhook Envelope (Open Evidence Schema v1)

# description
Wrapper applied to every outbound webhook delivery. Receivers SHOULD verify X-RC-Signature: sha256=<hex> where <hex> = HMAC-SHA256(endpoint.signing_secret, raw_body).

# properties.delivery_id.description
Unique id of THIS delivery attempt. Mirrored in the X-RC-Delivery-Id header so receivers can correlate logs.

# properties.source_event_id.description
The chained event_id of the source domain event. Cross-references the event hash chain and can be used to request a chain proof.

# properties.timestamp.description
ISO 8601 UTC timestamp when the delivery was signed — not when the source event occurred. Receivers MAY reject deliveries older than 5 minutes to mitigate replay.

# properties.payload.description
Domain event payload. Shape depends on event_type. See the corresponding type-specific schema.