# External source check (KB-MARGIN-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-KB-MARGIN-20260831.json`](./external-source-check-KB-MARGIN-20260831.json).

| Source | Requested URL | Final URL | HTTP | Title SHA-256 | Note | Use |
|---|---|---|---|---|---|---|
| The Aqua Book | https://www.gov.uk/government/publications/the-aqua-book-guidance-on-producing-quality-analysis-for-government | https://www.gov.uk/guidance/the-aqua-book | 200 | f618e2989914313f |  | Quality assurance and proportionate review |
| Assessing Data Reliability | https://www.gao.gov/products/gao-20-283g | https://www.gao.gov/products/gao-20-283g | 200 | 4b63162eff92e4ec |  | Source reliability, corroboration, and limitations |
| AI Risk Management Framework | https://www.nist.gov/itl/ai-risk-management-framework | https://www.nist.gov/itl/ai-risk-management-framework | 200 | 274a251954063e95 |  | Risk ownership and evaluation context |
| ISO/IEC 11179 metadata registries | https://www.iso.org/standard/53691.html | https://www.iso.org/standard/53691.html | 403 | 301dc171e5fa8c5f | http 403 | Metadata-registry concepts |
| Top 10 for LLM Applications | 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 |  | Prompt injection and sensitive-data risk |

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