Chain of custody receipt

Source #50889

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: White House Historical Association — USASpending contracts (no results)
Original URL(none — typed-API result with no web URL)
PublicationSearch Scope Note
Source typecontract
Date2026
EntityWhite House Historical Association
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-13T07:48:03.117Z UTC
SHA-256d8dc058549699567a9ea404928f3db286c475f20f59d3cd27c34d831cd8f8e29
Content length237 bytes
Content preview (first 800 chars) 
No USASpending contracts found for "White House Historical Association" 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/50889/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/50889/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/50889/receipt.json