certificate.timestamped
Fires when a covered verification's qualified timestamp lands, minutes after verification.completed. If you publish automatically, publish on this event: the warranty covers a publication that FOLLOWS the timestamp, and verification.completed fires while the qualified timestamp is still pending.
postWebhookcertificate.timestamped
Payload
Response
Your endpoint should return 2xx within 5 seconds. Non-2xx triggers retries at 10s / 60s / 600s (3 retries after the initial delivery, 4 attempts total).
Changes
Webhooks have no change history: a webhook is keyed by its event name rather than a path and method, so no recorded change can name it.