Chain of custody receipt

Source #21954

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.

TitleDonor mapping evidence: Mast has filed 18 STOCK Act reports with a total of 49 transactions involving 16
Original URLhttps://www.gurufocus.com/insider/summary/Representative+Brian+J.+Mast
PublicationFEC / handoff
Source typecongress_handoff
Date—
EntityBrian J. Mast
Captured2026-04-27T05:09:00.550Z UTC
SHA-256No hash captured. This row predates the chain-of-custody system OR no raw_content was stored.

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/21954/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/21954/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/21954/receipt.json