Chain of custody receipt

Source #45067

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 — David Sacks (2010-02-08)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22David%20Sacks%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2010-02-08
EntityDavid Sacks
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-13T05:01:59.649Z UTC
SHA-256ae67effad8f7b65d7ae64d70e774c31465b944258e9c5dcefedcd8d0bbf71f5c
Content length578 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0001453887"
  ],
  "period_ending": null,
  "file_num": [
    "021-126049"
  ],
  "display_names": [
    "YAMMER INC  (CIK 0001453887)"
  ],
  "xsl": "xslFormDX01",
  "schema_version": "X0603",
  "sequence": 1,
  "root_forms": [
    "D"
  ],
  "file_date": "2010-02-08",
  "biz_states": [
    "CA"
  ],
  "sics": [],
  "form": "D",
  "adsh": "0001453887-10-000003",
  "film_num": [
    "10580439"
  ],
  "biz_locations": [
    "San Francisco, CA"
  ],
  "file_type": "D",
  "file_description": null,
  "inc_states": [
    "DE"
  ],
  "items": [
    "06"
  ]
}

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/45067/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/45067/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/45067/receipt.json