Chain of custody receipt

Source #43848

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 — Ilya Sutskever (2026-04-17)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Ilya%20Sutskever%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2026-04-17
EntityIlya Sutskever
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-13T05:05:26.323Z UTC
SHA-25636820291cd0268376debaccfb0788fe8e12986c3996b326910627dbefd73e1d8
Content length564 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0002021728"
  ],
  "period_ending": null,
  "file_num": [
    "333-295145"
  ],
  "display_names": [
    "Cerebras Systems Inc.  (CIK 0002021728)"
  ],
  "xsl": null,
  "sequence": "8",
  "root_forms": [
    "S-1"
  ],
  "file_date": "2026-04-17",
  "biz_states": [
    "CA"
  ],
  "sics": [
    "3674"
  ],
  "form": "S-1",
  "adsh": "0001628280-26-025762",
  "film_num": [
    "26871884"
  ],
  "biz_locations": [
    "Sunnyvale, CA"
  ],
  "file_type": "EX-4.3",
  "file_description": "EX-4.3",
  "inc_states": [
    "DE"
  ],
  "items": []
}

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/43848/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/43848/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/43848/receipt.json