Chain of custody receipt

Source #475

Cryptographic attestation that the document below was captured in Goblin House's archive at the timestamp shown, with the hash listed. If the original URL goes dark or its content changes, this receipt remains as evidence of what the public record looked like at capture time.

TitleResearch: ImmigrationOS - parliamentary record
Original URL(none — typed-API result with no web URL)
PublicationPublic Record Research
Source typeparliamentary_record
Date2024
EntityImmigrationOS
Captured2026-04-05T09:03:44.643Z UTC
Hash computed at2026-04-05T09:03:44.643Z UTC
SHA-256a931c52f124759fe0384418e60db5b96dd5ea5eba4d0a89341340dc1dee4923f
Content length459 bytes
Content preview (first 800 chars) 
ImmigrationOS is an immigration case management software system that has been referenced in UK parliamentary proceedings, primarily in the context of Home Office modernisation efforts and immigration system digitalisation. The system is part of broader efforts to replace legacy IT infrastructure within UK Visas and Immigration (UKVI). Parliamentary questions and committee discussions have addressed its implementation, costs, and operational effectiveness.

Verifying this receipt

The hash above was computed as:

sha256( coalesce(url, '<no-url>') || '\n' || raw_content )

Anyone with a copy of the original document can verify the match:

  1. Take the URL field and the original document content.
  2. Concatenate url + '\n' + content and SHA-256 it.
  3. Compare to the SHA-256 row above.

Or POST the candidate content to /source/475/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/475/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/475/receipt.json