Chain of custody receipt

Source #41216

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 — Magnachip Semiconductor Corporation (2022-02-23)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Magnachip%20Semiconductor%20Corporation%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2022-02-23
EntityMagnachip Semiconductor Corporation
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-13T05:13:47.632Z UTC
SHA-2569fac9a88ad88c3fdee4d435f867ac73b5cdcc976f3b7607acd9037f4a6266277
Content length586 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0001325702"
  ],
  "period_ending": "2021-12-31",
  "file_num": [
    "001-34791"
  ],
  "display_names": [
    "MAGNACHIP SEMICONDUCTOR Corp  (MX)  (CIK 0001325702)"
  ],
  "xsl": null,
  "sequence": 1,
  "root_forms": [
    "10-K"
  ],
  "file_date": "2022-02-23",
  "biz_states": [
    "N4"
  ],
  "sics": [
    "3674"
  ],
  "form": "10-K",
  "adsh": "0001193125-22-050017",
  "film_num": [
    "22664336"
  ],
  "biz_locations": [
    "Luxembourg, N4"
  ],
  "file_type": "10-K",
  "file_description": "FORM 10-K",
  "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/41216/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/41216/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/41216/receipt.json