Chain of custody receipt

Source #8595

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 — Matthew Quinn (2023-10-03)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Matthew%20Quinn%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typeweb_search
Date2023-10-03
EntityMatthew Quinn
Captured2026-04-13T19:20:15.573Z UTC
Hash computed at2026-04-13T19:20:15.573Z UTC
SHA-256895abf3188fcce650c93e93ab34b500ab93908712813b4d0485f96162cff0949
Content length11,896 bytes
Content preview (first 800 chars)
{"took":3837,"timed_out":false,"_shards":{"total":50,"successful":50,"skipped":0,"failed":0},"hits":{"total":{"value":19,"relation":"eq"},"max_score":18.82534,"hits":[{"_index":"edgar_file","_id":"0001127602-23-025172:doc1.txt","_score":18.82534,"_source":{"ciks":["0001899207","0001494259"],"period_ending":"2023-09-29","file_num":["001-38233"],"display_names":["Quinn Matthew Todd (CIK 0001899207)","CarGurus, Inc. (CARG) (CIK 0001494259)"],"xsl":null,"sequence":2,"root_forms":["4"],"file_date":"2023-10-03","biz_states":["MA"],"sics":["7374"],"form":"4","adsh":"0001127602-23-025172","film_num":["231303843"],"biz_locations":["","Cambridge, MA"],"file_type":"EX-24","file_description":"POWER OF ATTORNEY (PUBLIC): EXHIBIT 24.2 - POWER OF…

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/8595/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/8595/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/8595/receipt.json