Chain of custody receipt

Source #80756

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.

Title	USASpending.gov: LINDE INC. — National Aeronautics and Space Administration contract NNS17AA07D ($10.62M)
Original URL	https://www.usaspending.gov/award/CONT_AWD_NNS17AA07D_8000_NNK15OW07B_8000/
Publication	USASpending.gov
Source type	`contract`
Date	2016-11-29
Entity	xAI
Captured	2026-10-03T13:46:58.620Z UTC
Hash computed at	2026-10-03T13:46:58.620Z UTC
SHA-256	`f54e0969a5410249627c82e349e51dc558d84aaec95dac98d02c9227c2619d83`
Content length	667 bytes

Content preview (first 800 chars)

{
  "internal_id": 311435542,
  "Award ID": "NNS17AA07D",
  "Recipient Name": "LINDE INC.",
  "Award Amount": 10617246.11,
  "Description": "DELIVERY ORDER FOR LIQUID HYDROGEN AGAINST KSC (KENNEDY SPACE CENTER)BASE CONTRACT NNK15OW07B, OPTION PERIOD 1 (DECEMBER 1, 2016 THROUGH NOVEMBER 30, 2018)",
  "Awarding Agency": "National Aeronautics and Space Administration",
  "Awarding Sub Agency": "National Aeronautics and Space Administration",
  "Start Date": "2016-11-29",
  "End Date": "2019-11-30",
  "awarding_agency_id": 862,
  "agency_slug": "national-aeronautics-and-space-administration",
  "generated_internal_id": "CONT_AWD_NNS17AA07D_8000_NNK15OW07B_8000"
}

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:

Take the URL field and the original document content.
Concatenate url + '\n' + content and SHA-256 it.
Compare to the SHA-256 row above.

Or POST the candidate content to /source/80756/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/80756/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/80756/receipt.json