Chain of custody receipt

Source #14306

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 Burnham (2003-11-04)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22John%20Burnham%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typeweb_search
Date2003-11-04
EntityJohn Burnham
Captured2026-04-23T08:34:23.751Z UTC
Hash computed at2026-04-23T08:34:23.751Z UTC
SHA-25629b7c97e4562dcea7d5abac1a22d95fe81ef24b2c8aa7477ca846e68728949be
Content length41,947 bytes
Content preview (first 800 chars)
{"took":1174,"timed_out":false,"_shards":{"total":50,"successful":50,"skipped":0,"failed":0},"hits":{"total":{"value":70,"relation":"eq"},"max_score":16.770077,"hits":[{"_index":"edgar_file","_id":"0001104659-06-013270:a06-2593_1ex21d1.htm","_score":16.770077,"_source":{"ciks":["0001011659"],"period_ending":"2005-12-31","file_num":["001-15081"],"display_names":["UNIONBANCAL CORP (CIK 0001011659)"],"xsl":null,"sequence":5,"root_forms":["10-K"],"file_date":"2006-03-01","biz_states":["CA"],"sics":["6021"],"form":"10-K","adsh":"0001104659-06-013270","film_num":["06657048"],"biz_locations":["San Francisco, CA"],"file_type":"EX-21.1","file_description":"SUBSIDIARIES OF THE…

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/14306/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/14306/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/14306/receipt.json