Source status

The latest successful sponsor-register build, its official source file, validation counts and tamper-evident receipt.

GOV.UK remains authoritative. This page shows whether KnowYourSponsor can account for its own latest mirror build. It is not a certificate issued by the Home Office.

Latest source integrity receipt

This receipt identifies the exact official CSV used for this release and records the transformation versions and counts needed to investigate a discrepancy. It proves reproducibility of our mirror, not that our mirror outranks the official register.

Verified pipeline run KYS-20260923T094800Z Retrieved 2026-09-23 09:48 UTC; source published 2026-09-23 09:18 UTC.

Official source file: 10,953,637 bytes Open the GOV.UK CSV · SHA-256 634deb34b761562d…
Input validation: 143,139 valid rows 0 malformed; 0 blank-name; 460 exact duplicates.
Published register: 127,704 records 127,415 distinct sponsor names.
Transformation: sponsor-register-parser/1 sponsor-register-normalizer/1; guard override: no.

Verification hashes

Source SHA-256
634deb34b761562d51235fa7e2b4ff8c5c5f79a944e79bf5cb5ff27b21fc66a8

Run manifest SHA-256
2e740302b32c3ddc9bd440ab35648a9396f6b3e0ea01099aae608d2b6890346d

Previous manifest SHA-256
First recorded manifest

The machine-readable latest receipt is available as source_status.json. 1 append-only run receipt(s) are retained.

How to use this page

Compare the source publication and retrieval times to understand freshness.
Use the source SHA-256 to identify the exact downloaded bytes.
Use the manifest hashes to detect a changed or missing run receipt.
If this page is stale or incomplete, check the official register directly.

Last updated 23 September 2026.