What depends on it
Ask what a key signed (since a time), what depends on an agent version, or where an erratum's correction reaches. Each answer is a receipt pinned to a signed checkpoint, the same one GET /v1/model/impact returns.
$ curl -H 'Accept: application/json' https://aisourceoftruth.com/impact # this page is a rendering of the API. Reproduce it as data.
ASK