Chain of custody receipt

Source #1503

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: Alex Karp — SEC filings (no results)
Original URL(none — typed-API result with no web URL)
PublicationAI Analysis — no URL
Source typesec_filing
Date2026
EntityAlex Karp
Captured2026-04-07T04:17:17.194Z UTC
Hash computed at2026-04-07T04:17:17.194Z UTC
SHA-25691634e2128e6eb8d3e52beb534d89d4be5e3b78a76ff4cc3f921e8ada423655c
Content length71 bytes
Content preview (first 800 chars) 
No SEC filings found for "Alex Karp" 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/1503/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/1503/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/1503/receipt.json