Chain of custody receipt

Source #45165

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.

TitleSEC EDGAR: filing — Cybersecurity and Infrastructure Security Agency (CISA) (2021-12-20)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Cybersecurity%20and%20Infrastructure%20Security%20Agency%20(CISA)%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2021-12-20
EntityCybersecurity and Infrastructure Security Agency (CISA)
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-13T05:01:59.649Z UTC
SHA-256356f324faa7d9cd4d83558ae3e5e7047d1be4ed8575c8e2b3d4d4d36976306f6
Content length581 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0001000230"
  ],
  "period_ending": "2021-10-31",
  "file_num": [
    "000-27022"
  ],
  "display_names": [
    "OPTICAL CABLE CORP  (OCC)  (CIK 0001000230)"
  ],
  "xsl": null,
  "sequence": 3,
  "root_forms": [
    "10-K"
  ],
  "file_date": "2021-12-20",
  "biz_states": [
    "VA"
  ],
  "sics": [
    "3357"
  ],
  "form": "10-K",
  "adsh": "0001437749-21-028951",
  "film_num": [
    "211504378"
  ],
  "biz_locations": [
    "Roanoke, VA"
  ],
  "file_type": "EX-13.1",
  "file_description": "EXHIBIT 13.1",
  "inc_states": [
    "VA"
  ],
  "items": []
}

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/45165/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/45165/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/45165/receipt.json