Chain of custody receipt

Source #2991

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.

TitleTHE ELEC industry report
Original URLhttps://apify.com/copious_atoll/usaspending-contracts
PublicationDirected Inquiry — Web Search
Source typeweb_search
Date—
EntityHPSP
Captured2026-04-08T18:27:16.728Z UTC
Hash computed at2026-04-08T18:27:16.728Z UTC
SHA-2560445e0ab278b0791a4fcc008f4987ff4521afd9c5e3357a96067935ab3a69c62
Content length123 bytes
Content preview (first 800 chars) 
HPSP is currently the exclusive supplier of HPA (High-pressure hydrogen annealing) used in the front-end of chip production

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/2991/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/2991/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/2991/receipt.json