Chain of custody receipt

Source #15570

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: Castelion — USASpending contracts (no results)
Original URL(none — typed-API result with no web URL)
PublicationSearch Scope Note
Source typecontract
Date2026
EntityCastelion
Captured2026-04-23T09:06:17.050Z UTC
Hash computed at2026-04-23T09:06:17.050Z UTC
SHA-256975fb9bae165d7de7c7bab62ee354d00b84fee1c121dda9e50eb785c810a8f4b
Content length212 bytes
Content preview (first 800 chars) 
No USASpending contracts found for "Castelion" in public databases or web search. This may be due to name variations, subsidiary filings, or limited search coverage — not necessarily absence from public record.

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/15570/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/15570/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/15570/receipt.json