# External source check (TA-GRAIN-20260831)

Checked 2026-09-04 with `scripts/verify-external-sources.py` (GET, follow redirects, 25s timeout). None of these pages audited this fixture. Machine log: [`external-source-check-TA-GRAIN-20260831.json`](./external-source-check-TA-GRAIN-20260831.json).

| Source | Requested URL | Final URL | HTTP | Title SHA-256 | Note | Use |
|---|---|---|---|---|---|---|
| Methodology | https://www.ons.gov.uk/methodology | https://www.ons.gov.uk/methodology | 200 | 4be8d687c4960e96 |  | Statistical-definition context |
| Digital Library | https://dl.acm.org/ | https://dl.acm.org/ | 403 | 301dc171e5fa8c5f | http 403 | Queueing and HCI research index |
| Data standards | https://www.epa.gov/data-standards | https://www.epa.gov/data/data-standards | 200 | 2944cf6aadb49333 |  | Exclusion-documentation context |
| Classifications | https://www.wipo.int/classifications/en/ | https://www.wipo.int/classifications/en/ | 200 | — |  | Taxonomy context |
| LLM Top 10 | https://owasp.org/www-project-top-10-for-large-language-model-applications/ | https://owasp.org/www-project-top-10-for-large-language-model-applications/ | 200 | 87974d0c19dc6a5c |  | Untrusted-text risk context |

Keep original requested URLs. Re-check at decision time.