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%233&as_of=22 # this page is a rendering of the API. Reproduce it as data.
ASK
As of checkpoint 22, signed 2026-11-10T16:37:42Z. 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#3 ACTIVE
publisherrepoops
version3
algorithmEd25519
active from2026-10-26T11:15:48Z
sinceevery record the key signed
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 22 · signed 2026-11-10T16:37:42Z
relied on0 record(s), 1 event row(s)
truncatedno
receipt sha-256
80b7d0f129f50e9d3766aace2e2a3b86bcb37f9409fab025a3ea8c6923b68cbd