Chain of custody receipt

Source #80764

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.

TitleUSASpending.gov: INVARIANT CORPORATION — Department of Defense contract W91ZLK08C0003 ($1.68M)
Original URLhttps://www.usaspending.gov/award/CONT_AWD_W91ZLK08C0003_9700_-NONE-_-NONE-/
PublicationUSASpending.gov
Source typecontract
Date2008-02-29
EntityInvariant
Captured2026-10-03T13:46:59.660Z UTC
Hash computed at2026-10-03T13:46:59.660Z UTC
SHA-2565cc8fda4bec1b82347215124d2ddfe144d5a5557741d5886fa9a72e7df5476d5
Content length508 bytes
Content preview (first 800 chars) 
{
  "internal_id": 350559641,
  "Award ID": "W91ZLK08C0003",
  "Recipient Name": "INVARIANT CORPORATION",
  "Award Amount": 1675867.83,
  "Description": "CELL-BASED HYPERSPECTRAL ATMOSPHERIC RADIATION MODEL",
  "Awarding Agency": "Department of Defense",
  "Awarding Sub Agency": "Department of the Army",
  "Start Date": "2008-02-29",
  "End Date": "2013-01-31",
  "awarding_agency_id": 1173,
  "agency_slug": "department-of-defense",
  "generated_internal_id": "CONT_AWD_W91ZLK08C0003_9700_-NONE-_-NONE-"
}

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/80764/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/80764/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/80764/receipt.json