Chain of custody receipt

Source #4345

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 (2013-02-22)
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 typeweb_search
Date2013-02-22
EntityMagnachip Semiconductor Corporation
Captured2026-04-12T01:50:50.378Z UTC
Hash computed at2026-04-12T01:50:50.378Z UTC
SHA-25686edee2868280fbfc07397f60d77594950a7ca556eb8fff8050dd812273a56f9
Content length60,169 bytes
Content preview (first 800 chars) 
{"took":422,"timed_out":false,"_shards":{"total":50,"successful":50,"skipped":0,"failed":0},"hits":{"total":{"value":592,"relation":"eq"},"max_score":24.387129,"hits":[{"_index":"edgar_file","_id":"0001193125-13-070260:d449766d10k.htm","_score":24.387129,"_source":{"ciks":["0001325702"],"period_ending":"2012-12-31","file_num":["001-34791"],"display_names":["MAGNACHIP SEMICONDUCTOR Corp (MX) (CIK 0001325702)"],"xsl":null,"sequence":1,"root_forms":["10-K"],"file_date":"2013-02-22","biz_states":["N4"],"sics":["3674"],"form":"10-K","adsh":"0001193125-13-070260","film_num":["13632268"],"biz_locations":["Luxembourg, N4"],"file_type":"10-K","file_description":"FORM…

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/4345/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/4345/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/4345/receipt.json