Chain of custody receipt

Source #1816

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: US Air Force — USASpending contracts (no results)
Original URL(none — typed-API result with no web URL)
PublicationAI Analysis — no URL
Source typecontract
Date2026
EntityUS Air Force
Captured2026-04-07T04:29:29.795Z UTC
Hash computed at2026-04-07T04:29:29.795Z UTC
SHA-256156fe224269719e247f2ffd3b3a6dd2c3e74cd3a3cd417699aaf0983b0ae5ec7
Content length84 bytes
Content preview (first 800 chars) 
No USASpending contracts found for "US Air Force" 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/1816/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/1816/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/1816/receipt.json