Chain of custody receipt

Source #67157

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 — SPARTON CORP (2012-09-05)
Original URLhttps://www.sec.gov/Archives/edgar/data/92679/000119312512380945/0001193125-12-380945-index.htm
PublicationSEC EDGAR
Source typesec_filing
Date2012-09-05
EntitySparton
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-06-01T02:15:34.277Z UTC
SHA-25689cdf23c79a22c7eca2f9b1b7eabdc30bde2a08d43b1c694a5388a9c740b01f6
Content length563 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0000092679"
  ],
  "period_ending": "2012-06-30",
  "file_num": [
    "001-01000"
  ],
  "display_names": [
    "SPARTON CORP  (CIK 0000092679)"
  ],
  "xsl": null,
  "sequence": 2,
  "root_forms": [
    "10-K"
  ],
  "file_date": "2012-09-05",
  "biz_states": [
    "MI"
  ],
  "sics": [
    "3672"
  ],
  "form": "10-K",
  "adsh": "0001193125-12-380945",
  "film_num": [
    "121074071"
  ],
  "biz_locations": [
    "Jackson, MI"
  ],
  "file_type": "EX-10.3",
  "file_description": "EX-10.3",
  "inc_states": [
    "OH"
  ],
  "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/67157/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/67157/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/67157/receipt.json