Chain of custody receipt

Source #4159

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 — Sidley Austin (2013-04-01)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Sidley%20Austin%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typeweb_search
Date2013-04-01
EntitySidley Austin
Captured2026-04-12T01:49:56.632Z UTC
Hash computed at2026-04-12T01:49:56.632Z UTC
SHA-25667f6ce5c8206f79fe8528a37c59dab1332f27141af4cf358c70461b6caedbce7
Content length63,777 bytes
Content preview (first 800 chars) 
{"took":883,"timed_out":false,"_shards":{"total":50,"successful":50,"skipped":0,"failed":0},"hits":{"total":{"value":4040,"relation":"eq"},"max_score":18.76751,"hits":[{"_index":"edgar_file","_id":"0001130319-02-001262:k72374exv99w4.txt","_score":18.76751,"_source":{"ciks":["0000028385"],"period_ending":"2002-09-30","file_num":["001-02198"],"display_names":["DETROIT EDISON CO (CIK 0000028385)"],"xsl":null,"sequence":"7","root_forms":["10-Q"],"file_date":"2002-11-14","biz_states":["MI"],"sics":["4911"],"form":"10-Q","adsh":"0001130319-02-001262","film_num":["02827722"],"biz_locations":["Detroit, MI"],"file_type":"EX-99.4","file_description":"THREE-YEAR CREDIT…

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/4159/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/4159/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/4159/receipt.json