Chain of custody receipt

Source #40526

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 — Blockchain Capital (2017-10-16)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Blockchain%20Capital%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2017-10-16
EntityBlockchain Capital
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-13T05:15:17.880Z UTC
SHA-2566dbc25ce31a38214c6641b52ee4d036ece4832db5e55d476d557886b22b1eb6b
Content length631 bytes
Content preview (first 800 chars)
{
  "ciks": [
    "0001719337"
  ],
  "period_ending": null,
  "file_num": [
    "021-296807"
  ],
  "display_names": [
    "Blockchain Capital Parallel Fund IV, LP  (CIK 0001719337)"
  ],
  "xsl": "xslFormDX01",
  "schema_version": "X0708",
  "sequence": 1,
  "root_forms": [
    "D"
  ],
  "file_date": "2017-10-16",
  "biz_states": [
    "CA"
  ],
  "sics": [],
  "form": "D",
  "adsh": "0001719337-17-000001",
  "film_num": [
    "171139196"
  ],
  "biz_locations": [
    "San Francisco, CA"
  ],
  "file_type": "D",
  "file_description": null,
  "inc_states": [
    "DE"
  ],
  "items": [
    "06B",
    "3C",
    "3C.1"
  ]
}

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/40526/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/40526/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/40526/receipt.json