Chain of custody receipt

Source #42770

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 — Samsung Electronics (2021-03-29)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Samsung%20Electronics%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2021-03-29
EntitySamsung Electronics
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-13T05:08:53.614Z UTC
SHA-25600ef6a8b3435b66221c10bac95b1337af9d6803929c79d0f551801f25e45d1b4
Content length573 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0000917273"
  ],
  "period_ending": "2020-12-31",
  "file_num": [
    "000-22339"
  ],
  "display_names": [
    "RAMBUS INC  (RMBS)  (CIK 0000917273)"
  ],
  "xsl": null,
  "sequence": 2,
  "root_forms": [
    "10-K"
  ],
  "file_date": "2021-03-29",
  "biz_states": [
    "CA"
  ],
  "sics": [
    "3674"
  ],
  "form": "10-K/A",
  "adsh": "0000917273-21-000010",
  "film_num": [
    "21780802"
  ],
  "biz_locations": [
    "San Jose, CA"
  ],
  "file_type": "EX-10.11",
  "file_description": "EX-10.11",
  "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/42770/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/42770/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/42770/receipt.json