Chain of custody receipt

Source #43623

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 — Gregory R. Dahlberg (2023-05-08)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Gregory%20R.%20Dahlberg%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2023-05-08
EntityGregory R. Dahlberg
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-13T05:05:26.323Z UTC
SHA-256377d8e52b5b94ac0deab1ebbcbb21e7976ca88f350e5aba739664c7aeed3bf9d
Content length670 bytes
Content preview (first 800 chars)
{
  "ciks": [
    "0001682434",
    "0001336920"
  ],
  "period_ending": "2023-05-05",
  "file_num": [
    "001-33072"
  ],
  "display_names": [
    "Dahlberg Gregory R  (CIK 0001682434)",
    "Leidos Holdings, Inc.  (LDOS)  (CIK 0001336920)"
  ],
  "xsl": "xslF345X04",
  "schema_version": "X0407",
  "sequence": 1,
  "root_forms": [
    "4"
  ],
  "file_date": "2023-05-08",
  "biz_states": [
    "VA"
  ],
  "sics": [
    "7373"
  ],
  "form": "4",
  "adsh": "0001628280-23-016452",
  "film_num": [
    "23898298"
  ],
  "biz_locations": [
    "",
    "Reston, VA"
  ],
  "file_type": "4",
  "file_description": "FORM 4",
  "inc_states": [
    ""
  ],
  "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/43623/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/43623/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/43623/receipt.json