Chain of custody receipt

Source #6023

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 — Boris Feldman (2019-04-16)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Boris%20Feldman%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typeweb_search
Date2019-04-16
EntityBoris Feldman
Captured2026-04-12T23:14:20.054Z UTC
Hash computed at2026-04-12T23:14:20.054Z UTC
SHA-256ea64e762119d790260cf49bd8e1fcfce40a7cba57fed0488ac50a7418719aac8
Content length3,159 bytes
Content preview (first 800 chars)
{"took":1356,"timed_out":false,"_shards":{"total":50,"successful":50,"skipped":0,"failed":0},"hits":{"total":{"value":3,"relation":"eq"},"max_score":5.1447296,"hits":[{"_index":"edgar_file","_id":"0000899681-01-500252:abc-ex21_083101.txt","_score":5.1447296,"_source":{"ciks":["0000051124"],"period_ending":"2000-12-31","file_num":["001-03410"],"display_names":["AMERICAN BANKNOTE CORP (CIK 0000051124)"],"xsl":null,"sequence":3,"root_forms":["10-K"],"file_date":"2001-08-30","biz_states":["NY"],"sics":["2750"],"form":"10-K","adsh":"0000899681-01-500252","film_num":["1728113"],"biz_locations":["New York, NY"],"file_type":"EX-2","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/6023/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/6023/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/6023/receipt.json