Chain of custody receipt

Source #45806

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 — Amkor Technology Korea (2023-02-22)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Amkor%20Technology%20Korea%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2023-02-22
EntityAmkor Technology Korea
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-13T04:45:55.076Z UTC
SHA-256d8af9cfe7cec5b1f60505e04a535c648a9044b5fa221688370237c04199a482b
Content length580 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0001047127"
  ],
  "period_ending": "2022-12-31",
  "file_num": [
    "000-29472"
  ],
  "display_names": [
    "AMKOR TECHNOLOGY, INC.  (AMKR)  (CIK 0001047127)"
  ],
  "xsl": null,
  "sequence": 8,
  "root_forms": [
    "10-K"
  ],
  "file_date": "2023-02-22",
  "biz_states": [
    "AZ"
  ],
  "sics": [
    "3674"
  ],
  "form": "10-K",
  "adsh": "0001047127-23-000009",
  "film_num": [
    "23652906"
  ],
  "biz_locations": [
    "Tempe, AZ"
  ],
  "file_type": "EX-10.35",
  "file_description": "EX-10.35",
  "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/45806/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/45806/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/45806/receipt.json