Chain of custody receipt

Source #128

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.

TitleResearch: Founders Fund - SEC filing
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Founders%20Fund%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationPublic Record Research
Source typeweb_search
Date2024
EntityFounders Fund
Captured2026-04-05T07:54:00.934Z UTC
Hash computed at2026-04-05T07:54:00.934Z UTC
SHA-256a4c6fbe6fd780180791d392ddf7835cf8b5bfba5b8551565f158591bdccd07c2
Content length100,355 bytes
Content preview (first 800 chars)
{"took":846,"timed_out":false,"_shards":{"total":50,"successful":50,"skipped":0,"failed":0},"hits":{"total":{"value":2895,"relation":"eq"},"max_score":13.21974,"hits":[{"_index":"edgar_file","_id":"0001104659-21-024295:tm216740-1_sc13g.htm","_score":13.21974,"_source":{"ciks":["0001559720","0001695329"],"period_ending":null,"file_num":["005-91861"],"display_names":["Airbnb, Inc. (ABNB) (CIK 0001559720)","Founders Fund II Management, LLC (CIK 0001695329)"],"xsl":null,"sequence":1,"root_forms":["SC 13G"],"file_date":"2021-02-16","biz_states":["CA"],"sics":["7340"],"form":"SC 13G","adsh":"0001104659-21-024295","film_num":["21640096"],"biz_locations":["San Francisco, CA","San Francisco, CA"],"file_type":"SC 13G","file_description":"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/128/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/128/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/128/receipt.json