Chain of custody receipt

Source #2351

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.

TitleResearch: Maven Smart System — USASpending contracts (no results)
Original URL(none — typed-API result with no web URL)
PublicationAI Analysis — no URL
Source typecontract
Date2026
EntityMaven Smart System
Captured2026-04-07T04:52:00.140Z UTC
Hash computed at2026-04-07T04:52:00.140Z UTC
SHA-25652678eca51a6ab240055ab5b1158fe85ec3f5a007c9b513455ba57ab892f52b3
Content length90 bytes
Content preview (first 800 chars) 
No USASpending contracts found for "Maven Smart System" in public databases or web search.

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/2351/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/2351/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/2351/receipt.json