Chain of custody receipt

Source #61411

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 — Kiewit Corp (2016-02-29)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Kiewit%20Corp%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2016-02-29
EntityKiewit Corp
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-24T23:58:36.790Z UTC
SHA-256887cc5ccf82f7adbadfe24071be69c6e3848c80b45876c5ce72e8059dbe4d2cc
Content length568 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0000077543"
  ],
  "period_ending": "2015-12-31",
  "file_num": [
    "001-06314"
  ],
  "display_names": [
    "TUTOR PERINI Corp  (TPC)  (CIK 0000077543)"
  ],
  "xsl": null,
  "sequence": 1,
  "root_forms": [
    "10-K"
  ],
  "file_date": "2016-02-29",
  "biz_states": [
    "CA"
  ],
  "sics": [
    "1540"
  ],
  "form": "10-K",
  "adsh": "0000077543-16-000076",
  "film_num": [
    "161469841"
  ],
  "biz_locations": [
    "Sylmar, CA"
  ],
  "file_type": "10-K",
  "file_description": "10-K",
  "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/61411/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/61411/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/61411/receipt.json