Chain of custody receipt

Source #65341

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: SC 13G — BERKSHIRE HATHAWAY INC (BRK-A, BRK-B) (2022-02-14)
Original URLhttps://www.sec.gov/Archives/edgar/data/56873/000119312522041705/0001193125-22-041705-index.htm
PublicationSEC EDGAR
Source typesec_filing
Date2022-02-14
EntityBerkshire Hathaway
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-31T03:40:44.762Z UTC
SHA-256a45e3da2b9f8408f03da57112cbb58fb7aa26f555ed42c3ae2eea4412ddcb91d
Content length693 bytes
Content preview (first 800 chars)
{
  "ciks": [
    "0000056873",
    "0001067983"
  ],
  "period_ending": null,
  "file_num": [
    "005-32470"
  ],
  "display_names": [
    "KROGER CO  (KR)  (CIK 0000056873)",
    "BERKSHIRE HATHAWAY INC  (BRK-A, BRK-B)  (CIK 0001067983)"
  ],
  "xsl": null,
  "sequence": 1,
  "root_forms": [
    "SC 13G"
  ],
  "file_date": "2022-02-14",
  "biz_states": [
    "OH",
    "NE"
  ],
  "sics": [
    "5411",
    "6331"
  ],
  "form": "SC 13G",
  "adsh": "0001193125-22-041705",
  "film_num": [
    "22631963"
  ],
  "biz_locations": [
    "Cincinnati, OH",
    "Omaha, NE"
  ],
  "file_type": "SC 13G",
  "file_description": "SC 13G",
  "inc_states": [
    "OH",
    "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/65341/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/65341/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/65341/receipt.json