Chain of custody receipt

Source #1836

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: National Security Agency (NSA) — USASpending contracts (no results)
Original URL(none — typed-API result with no web URL)
PublicationAI Analysis — no URL
Source typecontract
Date2026
EntityNational Security Agency (NSA)
Captured2026-04-07T04:31:26.601Z UTC
Hash computed at2026-04-07T04:31:26.601Z UTC
SHA-2561b81aea7b0085d3dca80f27be3f1474adbcc4d964c6ddde35f05a45bece17533
Content length102 bytes
Content preview (first 800 chars) 
No USASpending contracts found for "National Security Agency (NSA)" in public databases or web search.

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/1836/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/1836/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/1836/receipt.json