Chain of custody receipt

Source #40071

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.

Title	SEC EDGAR: filing — Brian Singerman (2020-12-22)
Original URL	https://efts.sec.gov/LATEST/search-index?q=%22Brian%20Singerman%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
Publication	SEC EDGAR
Source type	`sec_filing`
Date	2020-12-22
Entity	Brian Singerman
Captured	1970-01-01T00:00:00.000Z UTC
Hash computed at	2026-05-13T05:15:17.880Z UTC
SHA-256	`96e0f1918812d0bd18f5f64d6ac714ea7f9eebb7df61187bae7d2bf6fc6790f9`
Content length	1,378 bytes

Content preview (first 800 chars)

{
  "ciks": [
    "0001697733",
    "0001813981",
    "0001601424",
    "0001601419",
    "0001835462",
    "0001211060",
    "0001822250"
  ],
  "period_ending": "2020-12-18",
  "file_num": [
    "001-39775",
    "001-39775",
    "001-39775",
    "001-39775",
    "001-39775",
    "001-39775"
  ],
  "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)",
    "Singerman Brian Aaron  (CIK 0001835462)",
    "THIEL PETER  (CIK 0001211060)",
    "ContextLogic Inc.  (LOGC)  (CIK 0001822250)"
  ],
  "xsl": "xslF345X03",
  "schema_version": "X0306",
  "sequence": 1,
  "root_forms": [
    "4"
  ]…

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:

Take the URL field and the original document content.
Concatenate url + '\n' + content and SHA-256 it.
Compare to the SHA-256 row above.

Or POST the candidate content to /source/40071/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/40071/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/40071/receipt.json