Chain of custody receipt

Source #42560

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 — Blake Masters (2019-03-22)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Blake%20Masters%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2019-03-22
EntityBlake Masters
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-13T05:10:53.003Z UTC
SHA-256069c121e894233d8bf799b8d658acad28c4f5dbdab29f2fe038b8aa27f4ef3fc
Content length591 bytes
Content preview (first 800 chars)
{
  "ciks": [
    "0001727383"
  ],
  "period_ending": null,
  "file_num": [
    "021-302901"
  ],
  "display_names": [
    "SPAR Technology Corp  (CIK 0001727383)"
  ],
  "xsl": "xslFormDX01",
  "schema_version": "X0708",
  "sequence": 1,
  "root_forms": [
    "D"
  ],
  "file_date": "2019-03-22",
  "biz_states": [
    "CA"
  ],
  "sics": [],
  "form": "D/A",
  "adsh": "0001727383-19-000001",
  "film_num": [
    "19699137"
  ],
  "biz_locations": [
    "Los Angeles, CA"
  ],
  "file_type": "D/A",
  "file_description": null,
  "inc_states": [
    "DE"
  ],
  "items": [
    "06C"
  ]
}

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/42560/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/42560/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/42560/receipt.json