Chain of custody receipt

Source #7403

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: High Pressure Hydrogen Annealing (HPHA) — USASpending contracts (no results)
Original URL(none — typed-API result with no web URL)
PublicationSearch Scope Note
Source typecontract
Date2026
EntityHigh Pressure Hydrogen Annealing (HPHA)
Captured2026-04-13T17:59:54.383Z UTC
Hash computed at2026-04-13T17:59:54.383Z UTC
SHA-256b118182629f2e1638790a2518aa67c50a77f582f63f71df1a3ca6d6c585d8430
Content length242 bytes
Content preview (first 800 chars) 
No USASpending contracts found for "High Pressure Hydrogen Annealing (HPHA)" 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/7403/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/7403/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/7403/receipt.json