Chain of custody receipt

Source #41652

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 — Covington and Burling (2019-04-05)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Covington%20and%20Burling%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2019-04-05
EntityCovington and Burling
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-13T05:10:53.003Z UTC
SHA-256474fd9cc88c846b4faeae2347ed81b721ddca7079d6b772c8ac284bfaf047e13
Content length570 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0001756262"
  ],
  "period_ending": null,
  "file_num": [
    "333-230736"
  ],
  "display_names": [
    "TransMedics Group, Inc.  (TMDX)  (CIK 0001756262)"
  ],
  "xsl": null,
  "sequence": 2,
  "root_forms": [
    "S-1"
  ],
  "file_date": "2019-04-05",
  "biz_states": [
    "MA"
  ],
  "sics": [
    "3845"
  ],
  "form": "S-1",
  "adsh": "0001193125-19-099213",
  "film_num": [
    "19735272"
  ],
  "biz_locations": [
    "Andover, MA"
  ],
  "file_type": "EX-1.1",
  "file_description": "EX-1.1",
  "inc_states": [
    "MA"
  ],
  "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/41652/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/41652/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/41652/receipt.json