Chain of custody receipt

Source #5275

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 — Jim Prokopanko (2011-01-19)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Jim%20Prokopanko%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typeweb_search
Date2011-01-19
EntityJim Prokopanko
Captured2026-04-12T17:39:35.215Z UTC
Hash computed at2026-04-12T17:39:35.215Z UTC
SHA-2560e86e63a9c972c79f0150ec91b8378c25cc25cc7773a7abde7f8d82816731644
Content length6,150 bytes
Content preview (first 800 chars) 
{"took":2984,"timed_out":false,"_shards":{"total":50,"successful":50,"skipped":0,"failed":0},"hits":{"total":{"value":8,"relation":"eq"},"max_score":18.322296,"hits":[{"_index":"edgar_file","_id":"0001193125-11-010130:dex998.htm","_score":18.322296,"_source":{"ciks":["0001285785","0000884100"],"period_ending":null,"file_num":["005-80123"],"display_names":["MOSAIC CO (MOS) (CIK 0001285785)","CARGILL INC (CIK 0000884100)"],"xsl":null,"sequence":5,"root_forms":["SC 13D"],"file_date":"2011-01-19","biz_states":["MN"],"sics":["2870"],"form":"SC 13D/A","adsh":"0001193125-11-010130","film_num":["11535986"],"biz_locations":["Plymouth, MN","Minnetonka, MN"],"file_type":"EX-99.8","file_description":"PRESS RELEASE DATED JANUARY 18…

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/5275/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/5275/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/5275/receipt.json