Chain of custody receipt

Source #12143

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 — Sparton (2012-09-05)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Sparton%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typeweb_search
Date2012-09-05
EntitySparton
Captured2026-04-23T06:28:12.561Z UTC
Hash computed at2026-04-23T06:28:12.561Z UTC
SHA-256caf734635c10f1187a11fd01b13655b12de8e8e1af5956512859b9187a250857
Content length58,413 bytes
Content preview (first 800 chars)
{"took":1201,"timed_out":false,"_shards":{"total":50,"successful":50,"skipped":0,"failed":0},"hits":{"total":{"value":1408,"relation":"eq"},"max_score":17.66643,"hits":[{"_index":"edgar_file","_id":"0000950152-01-504845:l90599aex13.txt","_score":17.66643,"_source":{"ciks":["0000092679"],"period_ending":"2001-06-30","file_num":["001-01000"],"display_names":["SPARTON CORP (CIK 0000092679)"],"xsl":null,"sequence":3,"root_forms":["10-K"],"file_date":"2001-10-04","biz_states":["MI"],"sics":["3714"],"form":"10-K/A","adsh":"0000950152-01-504845","film_num":["1752260"],"biz_locations":["Jackson, MI"],"file_type":"EX-13","file_description":"EXHIBIT…

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/12143/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/12143/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/12143/receipt.json