Chain of custody receipt

Source #5398

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 — Defense Counterintelligence and Security Agency (DCSA) (2021-03-09)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Defense%20Counterintelligence%20and%20Security%20Agency%20(DCSA)%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typeweb_search
Date2021-03-09
EntityDefense Counterintelligence and Security Agency (DCSA)
Captured2026-04-12T17:40:28.808Z UTC
Hash computed at2026-04-12T17:40:28.808Z UTC
SHA-256a4ccd9065ee2b9914800b51b0eff6ae2d9ab6744b044a0ed1448438545c91c52
Content length35,712 bytes
Content preview (first 800 chars) 
{"took":728,"timed_out":false,"_shards":{"total":50,"successful":50,"skipped":0,"failed":0},"hits":{"total":{"value":61,"relation":"eq"},"max_score":17.423462,"hits":[{"_index":"edgar_file","_id":"0001049521-19-000035:a2019proxystatement.htm","_score":17.423462,"_source":{"ciks":["0001049521"],"period_ending":"2019-10-23","file_num":["000-23599"],"display_names":["MERCURY SYSTEMS INC (MRCY) (CIK 0001049521)"],"xsl":null,"sequence":1,"root_forms":["DEF 14A"],"file_date":"2019-08-30","biz_states":["MA"],"sics":["3670"],"form":"DEF 14A","adsh":"0001049521-19-000035","film_num":["191069565"],"biz_locations":["Andover, MA"],"file_type":"DEF 14A","file_description":"DEF…

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/5398/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/5398/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/5398/receipt.json