Chain of custody receipt

Source #62770

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 — North American Coal Corp (2022-03-02)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22North%20American%20Coal%20Corp%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2022-03-02
EntityNorth American Coal Corp
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-25T07:23:58.918Z UTC
SHA-256b019f8d0461da199a7d825c6301a0287b2399e1606502ad431687ba98f4998db
Content length579 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0000789933"
  ],
  "period_ending": "2021-12-31",
  "file_num": [
    "001-09172"
  ],
  "display_names": [
    "NACCO INDUSTRIES INC  (NC)  (CIK 0000789933)"
  ],
  "xsl": null,
  "sequence": 27,
  "root_forms": [
    "10-K"
  ],
  "file_date": "2022-03-02",
  "biz_states": [
    "OH"
  ],
  "sics": [
    "3630"
  ],
  "form": "10-K",
  "adsh": "0000789933-22-000015",
  "film_num": [
    "22704453"
  ],
  "biz_locations": [
    "Cleveland, OH"
  ],
  "file_type": "EX-99.2",
  "file_description": "EX-99.2",
  "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/62770/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/62770/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/62770/receipt.json