Chain of custody receipt

Source #5768

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 — John Larson (2011-02-25)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22John%20Larson%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typeweb_search
Date2011-02-25
EntityJohn Larson
Captured2026-04-12T23:12:36.642Z UTC
Hash computed at2026-04-12T23:12:36.642Z UTC
SHA-256a53f56ccc6560a3b375dbc6528c3deb003003af096b62d6693f14a46fef68abb
Content length28,913 bytes
Content preview (first 800 chars)
{"took":1547,"timed_out":false,"_shards":{"total":50,"successful":50,"skipped":0,"failed":0},"hits":{"total":{"value":48,"relation":"eq"},"max_score":17.665539,"hits":[{"_index":"edgar_file","_id":"0001424884-11-000029:larson13d.htm","_score":17.665539,"_source":{"ciks":["0001511126","0001399095"],"period_ending":null,"file_num":["005-86080"],"display_names":["Larson John (CIK 0001511126)","TC Power Management Corp. (CIK 0001399095)"],"xsl":null,"sequence":1,"root_forms":["SC 13D"],"file_date":"2011-02-25","biz_states":["NY"],"sics":["8742"],"form":"SC 13D","adsh":"0001424884-11-000029","film_num":["11640125"],"biz_locations":["","New York, NY"],"file_type":"SC…

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/5768/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/5768/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/5768/receipt.json