Chain of custody receipt

Source #187

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 - federal contracts site:usaspending.gov
Original URLhttps://www.usaspending.gov/search/?hash=eyJmaWx0ZXJzIjp7ImtleXdvcmQiOiJJbW1pZ3JhdGlvbk9TIn19
PublicationPublic Record Research
Source typediscovery_scope_note
Date2024
EntityImmigrationOS
Captured2026-04-05T08:04:06.299Z UTC
Hash computed at2026-04-05T08:04:06.299Z UTC
SHA-256c5ef64c5d95f22c81f2ebcda5a4c07e6ad10c67ae7c119a7528c41a7e5e62c46
Content length575 bytes
Content preview (first 800 chars) 
ImmigrationOS is a case management software platform developed by Palantir Technologies, specifically designed for immigration enforcement operations. The system has been deployed by U.S. Immigration and Customs Enforcement (ICE) as part of broader technology contracts with Palantir. Direct contract records specifically labeled 'ImmigrationOS' on USASpending.gov are typically bundled within larger Palantir contracts with ICE and DHS rather than itemized separately. The platform is part of Palantir's suite of tools used by ICE's Enforcement and Removal Operations (ERO).

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/187/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/187/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/187/receipt.json