Chain of custody receipt

Source #142

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	Research: Nvidia - federal contracts site:usaspending.gov
Original URL	https://www.usaspending.gov/search/?hash=eyJmaWx0ZXJzIjp7ImtleXdvcmQiOiJOdmlkaWEifX0
Publication	Public Record Research
Source type	`discovery_scope_note`
Date	2024
Entity	Nvidia
Captured	2026-04-05T07:56:29.227Z UTC
Hash computed at	2026-04-05T07:56:29.227Z UTC
SHA-256	`d80459e5f6094f30d4770a782f9be0c69de0ec017f08ee5f972c9623251f691f`
Content length	620 bytes

Content preview (first 800 chars)

Nvidia Corporation has received numerous federal contracts documented in USASpending.gov, the official source for U.S. government spending data. The company's federal contracts span multiple agencies, with significant procurement activity from the Department of Defense, Department of Energy, and various intelligence community agencies. Contracts primarily involve GPU hardware, high-performance computing systems, and artificial intelligence/machine learning capabilities. The company's DUNS number and CAGE codes are registered in the System for Award Management (SAM.gov), making it eligible for federal contracting.

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.

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curl -X POST https://www.goblinhouse.net/source/142/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/142/receipt.json