Chain of custody receipt

Source #64979

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: 10-K — Marathon Petroleum Corp (2021-02-26)
Original URLhttps://www.sec.gov/Archives/edgar/data/1510295/000151029521000027/0001510295-21-000027-index.htm
PublicationSEC EDGAR
Source typesec_filing
Date2021-02-26
EntityMarathon Petroleum
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-31T02:29:04.459Z UTC
SHA-25640ac18bddc97cf9afafe8de1c2dedf1c6db47b7be0ed9264a0ddf4bcc9f7b95d
Content length581 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0001510295"
  ],
  "period_ending": "2020-12-31",
  "file_num": [
    "001-35054"
  ],
  "display_names": [
    "Marathon Petroleum Corp  (MPC)  (CIK 0001510295)"
  ],
  "xsl": null,
  "sequence": 13,
  "root_forms": [
    "10-K"
  ],
  "file_date": "2021-02-26",
  "biz_states": [
    "OH"
  ],
  "sics": [
    "2911"
  ],
  "form": "10-K",
  "adsh": "0001510295-21-000027",
  "film_num": [
    "21683908"
  ],
  "biz_locations": [
    "Findlay, OH"
  ],
  "file_type": "EX-21.1",
  "file_description": "EX-21.1",
  "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/64979/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/64979/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/64979/receipt.json