How to prove that a task actually ran

Issue a receipt when it completes. It returns a sha256 digest that anyone can verify later.

Run it

curl -s -X POST https://api.model.tools/api/v1/receipt -H 'Content-Type: application/json' -d '{"subject":"ran nightly migration"}'

Response

{"ok":true,"id":"…","digest":"bc7523…","verify_url":"…/api/v1/receipt/…"}