Chain of custody receipt

Source #46602

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 — Brian Jack (2021-04-12)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Brian%20Jack%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2021-04-12
EntityBrian Jack
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-13T04:18:48.919Z UTC
SHA-256faf1d0523bbba9926ee5a4b7d986848f05ff059f9bef2b836e0819c85755c00a
Content length555 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0001664998"
  ],
  "period_ending": null,
  "file_num": [
    "333-254518"
  ],
  "display_names": [
    "KnowBe4, Inc.  (CIK 0001664998)"
  ],
  "xsl": null,
  "sequence": 1,
  "root_forms": [
    "S-1"
  ],
  "file_date": "2021-04-12",
  "biz_states": [
    "FL"
  ],
  "sics": [
    "7370"
  ],
  "form": "S-1/A",
  "adsh": "0001628280-21-006752",
  "film_num": [
    "21819296"
  ],
  "biz_locations": [
    "Clearwater, FL"
  ],
  "file_type": "S-1/A",
  "file_description": "S-1/A",
  "inc_states": [
    "DE"
  ],
  "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/46602/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/46602/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/46602/receipt.json