Chain of custody receipt

Source #62905

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 — Marc Andreessen (2020-01-10)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Marc%20Andreessen%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2020-01-10
EntityMarc Andreessen
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-25T07:26:30.909Z UTC
SHA-25606694f251c817c7a68bbb955a7d647932047acd5703e876301391ed4546b77fc
Content length804 bytes
Content preview (first 800 chars)
{
  "ciks": [
    "0001160077",
    "0001166586",
    "0001764925"
  ],
  "period_ending": "2020-01-08",
  "file_num": [
    "001-38926",
    "001-38926"
  ],
  "display_names": [
    "Andreessen Marc L  (CIK 0001160077)",
    "HOROWITZ BENJAMIN A  (CIK 0001166586)",
    "Slack Technologies, Inc.  (CIK 0001764925)"
  ],
  "xsl": "xslF345X03",
  "schema_version": "X0306",
  "sequence": 1,
  "root_forms": [
    "4"
  ],
  "file_date": "2020-01-10",
  "biz_states": [
    "CA"
  ],
  "sics": [
    "7385"
  ],
  "form": "4",
  "adsh": "0001209191-20-003112",
  "film_num": [
    "20522172",
    "20522173"
  ],
  "biz_locations": [
    "",
    "",
    "San Francisco, CA"
  ],
  "file_type": "4",
  "file_description": "FORM 4 SUBMISSION",
  "inc_states": [
    "",
    "",
    "DE"
  ]…

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/62905/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/62905/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/62905/receipt.json