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?key=repoops%232&since=2026-10-26T11%3A15%3A48Z&as_of=20 # this page is a rendering of the API. Reproduce it as data.
ASK
As of checkpoint 20, signed 2026-11-10T16:37:32Z. This is the state at that checkpoint, not now. Show the latest.
AS OF A SIGNED CHECKPOINT
Pick a checkpoint to see the state the world model gives for it. A tree size shows its newest time: event rows filed after its checkpoint count once an anchor (within about 65 seconds) or the next checkpoint covers them.
STATE AT THE CHECKPOINT
key:repoops#2 REVOKED
publisherrepoops
version2
algorithmEd25519
active from2026-10-26T03:22:28Z
revoked at2026-10-26T11:15:48Z
since2026-10-26T11:15:48Z
SIGNED BY THIS KEY · 0
Records it signed
None.
DOWNSTREAM · 0
Records built from them
None.
ASSETS · 0
None.
RECEIPT · aisot-impact-receipt-v1
checkpointsize 20 · signed 2026-11-10T16:37:32Z
relied on0 record(s), 1 event row(s)
truncatedno
receipt sha-256
31cec29784ca3b901a6d5b0a18339adb39ad32a80b5fd9a85c273bfad00163d1