Chain of custody receipt

Source #70531

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: 10-K — GENERAL DYNAMICS CORP (2018-02-12)
Original URLhttps://www.sec.gov/Archives/edgar/data/40533/000004053318000008/0000040533-18-000008-index.htm
PublicationSEC EDGAR
Source typesec_filing
Date2018-02-12
EntityGeneral Dynamics
Captured2026-09-27T18:31:50.516Z UTC
Hash computed at2026-09-27T18:31:50.516Z UTC
SHA-2562a4823e5838a2afbd00ee4ba9c1201107394def329d70be417e51937e21f45fd
Content length583 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0000040533"
  ],
  "period_ending": "2017-12-31",
  "file_num": [
    "001-03671"
  ],
  "display_names": [
    "GENERAL DYNAMICS CORP  (GD)  (CIK 0000040533)"
  ],
  "xsl": null,
  "sequence": 4,
  "root_forms": [
    "10-K"
  ],
  "file_date": "2018-02-12",
  "biz_states": [
    "VA"
  ],
  "sics": [
    "3730"
  ],
  "form": "10-K",
  "adsh": "0000040533-18-000008",
  "film_num": [
    "18594442"
  ],
  "biz_locations": [
    "Falls Church, VA"
  ],
  "file_type": "EX-21",
  "file_description": "EXHIBIT 21",
  "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/70531/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/70531/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/70531/receipt.json