Signed Brief · Provenance Ledger
Brief Receipt
fe385e55-cea4-4e39-a31f-8681c515de4a
This edition
This receipt signed the edition wpsr-2026-08-21-3, published on 28 August 2026 by Daniel Zhang, the named editor accountable for it. The editor is named from the edition’s publication record; the signed receipt attests the text, its sources and the model.
Status: superseded on 16 September 2026. This receipt still verifies the text exactly as it was signed. This edition was superseded. The current EIA WPSR brief covers the week ending 11 September 2026. The current edition is wpsr-2026-09-11-2.
Signature and hash
The signature is checked against the published key. The hash row checks that the content hash shown under “Attested facts” is the one the signature covers: the receipt stores that hash, not the text.
Sources
Each cited source is re-read on this view unless Kitalpha no longer reads it by policy. The receipt records each source’s HTTP status and the time of the check made when it was signed — not a copy of its page and not a hash of it — so this table says whether each source answers now and what it answered at signing; it does not say whether the page’s content has changed. “reachable” means it answered HTTP 200 just now.
| Source | At signing | Now |
|---|---|---|
| https://www.eia.gov/petroleum/supply/weekly/ | 200 · 28 August 2026 | reachable — HTTP 200 just now; HTTP 200 at signing |
Verdict
The signature verifies against the published key and the content hash shown is the one it covers. Every cited source Kitalpha reads answered HTTP 200 just now, as it did when the receipt was signed. The receipt records each source's status and time at signing, not its content, so whether a source's page has changed since signing is not checked here.
Attested facts
| Content hash (SHA-256) | 0c8513edbbfbafd7df6dc8489dcebe8eae01abbd70841a2fa684dcb9237b4e8c |
|---|---|
| Model | kitalpha-wpsr-brief · wpsr-draft+wpsr-firewall-v1 |
| Generated at | 2026-08-28T05:14:19.862+00:00 |
| Public key | 49326fb2fc3e4361a67037bea7bc64aeb8819c38ea169c560089222e719a2c62 |
Raw signed payload & signature
signature: e8b6edd9024e987785226e4ee1b9b08f83540bf6715836a0c60ccca050dbb0c38cbf9bbb1073df53dd175ec917a83caa53b7ecc57430c3f74e939c21b90a3906
{
"v": 1,
"model": {
"id": "kitalpha-wpsr-brief",
"version": "wpsr-draft+wpsr-firewall-v1"
},
"sources": [
{
"url": "https://www.eia.gov/petroleum/supply/weekly/",
"status": 200,
"checked_at": "2026-08-28T05:14:18.929Z"
}
],
"content_hash": "0c8513edbbfbafd7df6dc8489dcebe8eae01abbd70841a2fa684dcb9237b4e8c",
"generated_at": "2026-08-28T05:14:19.862Z"
} Re-verify independently with the published key at /.well-known/kitalpha-provenance.json. Learn how this works on the provenance page.
Voluntary transparency aligned with the spirit of EU AI Act Article 50 (transparency obligations for AI-generated content, applying 2 August 2026). This is trust infrastructure and general information only — not a legal-compliance claim and not legal advice.