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=21 # this page is a rendering of the API. Reproduce it as data.
ASK
As of checkpoint 21, signed 2026-11-10T16:37:37Z. 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 21 · signed 2026-11-10T16:37:37Z
relied on0 record(s), 1 event row(s)
truncatedno
receipt sha-256
7a8b492996c458acb0fbda19824b394588dcc7d5641e9f53911e749ceb38abfd