Chain of custody receipt

Source #14495

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 — Brian Singerman (2021-01-20)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Brian%20Singerman%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typeweb_search
Date2021-01-20
EntityBrian Singerman
Captured2026-04-23T08:39:22.647Z UTC
Hash computed at2026-04-23T08:39:22.647Z UTC
SHA-2564bb7330af33239e847698d4e24ab0aa8d099b566cbfee7c268c27fac2539b113
Content length22,222 bytes
Content preview (first 800 chars) 
{"took":1146,"timed_out":false,"_shards":{"total":50,"successful":50,"skipped":0,"failed":0},"hits":{"total":{"value":29,"relation":"eq"},"max_score":26.114626,"hits":[{"_index":"edgar_file","_id":"0001209191-21-004575:doc4.xml","_score":26.114626,"_source":{"ciks":["0001697733","0001813981","0001601424","0001601419","0001211060","0001835462","0001820953"],"period_ending":"2021-01-15","file_num":["001-39888","001-39888","001-39888","001-39888","001-39888","001-39888"],"display_names":["Founders Fund V Management, LLC (CIK 0001697733)","Founders Fund V Entrepreneurs Fund, LP (CIK 0001813981)","Founders Fund V Principals Fund, LP (CIK 0001601424)","Founders Fund V, LP (CIK 0001601419)","THIEL PETER (CIK 0001211060)","Singerman Brian Aaron (CIK 0001835462)","Affirm Holdings, Inc. (AFRM)…

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/14495/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/14495/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/14495/receipt.json