Chain of custody receipt

Source #80767

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 W31P4Q05CR008 ($724.4K)
Original URLhttps://www.usaspending.gov/award/CONT_AWD_W31P4Q05CR008_9700_-NONE-_-NONE-/
PublicationUSASpending.gov
Source typecontract
Date2005-01-26
EntityInvariant
Captured2026-10-03T13:46:59.709Z UTC
Hash computed at2026-10-03T13:46:59.709Z UTC
SHA-256e707d67cddb0922644affbbfc88a039964513555d95bfa3de45b84367cb174e2
Content length1,068 bytes
Content preview (first 800 chars) 
{
  "internal_id": 348938145,
  "Award ID": "W31P4Q05CR008",
  "Recipient Name": "INVARIANT CORPORATION",
  "Award Amount": 724384.31,
  "Description": "200504!000837!2100!W31P4Q!USA AVIATION AND MISSILE COMMAND!W31P4Q05CR008  !A!N! !N!             !      !20050126!20070201!021705731!021705731!021705731!N!INVARIANT CORPORATION         !1428 WEATHERLY RD SE # 108!HUNTSVILLE          !AL!35803!37000!089!01!HUNTSVILLE          !MADISON               !ALABAMA   !+000000357596!N!N!000000000000!AD92!RDTE/OTHER DEFENSE-APPLIED RESEARCH               !A2 !MISSILE AND SPACE SYSTEMS           !000 !*                             !541710!E! !3! ! ! ! ! !20200930!B! ! !N!Z!A!N!U!2!002!K!  !Z!Y!Z! !  !N!B!N!N! ! !A! !B!A!000!C!B!N! ! ! ! !    !      !0001! !",
  "Awarding Agency": "Department of…

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/80767/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/80767/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/80767/receipt.json