Chain of custody receipt

Source #48012

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 — Lightning Labs (2018-04-18)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Lightning%20Labs%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2018-04-18
EntityLightning Labs
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-13T04:14:36.745Z UTC
SHA-2569ff33dd7e059a86a2c9ca347f35d4281844ff0b505603e2ee89fa7fe3139767a
Content length585 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0001737676"
  ],
  "period_ending": null,
  "file_num": [
    "021-310511"
  ],
  "display_names": [
    "Lightning Labs, Inc.  (CIK 0001737676)"
  ],
  "xsl": "xslFormDX01",
  "schema_version": "X0708",
  "sequence": 1,
  "root_forms": [
    "D"
  ],
  "file_date": "2018-04-18",
  "biz_states": [
    "CA"
  ],
  "sics": [],
  "form": "D",
  "adsh": "0001737676-18-000001",
  "film_num": [
    "18761817"
  ],
  "biz_locations": [
    "Palo Alto, CA"
  ],
  "file_type": "D",
  "file_description": null,
  "inc_states": [
    "DE"
  ],
  "items": [
    "06B"
  ]
}

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/48012/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/48012/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/48012/receipt.json