Chain of custody receipt

Source #45694

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 — Cowen & Company (2019-02-27)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Cowen%20%26%20Company%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2019-02-27
EntityCowen & Company
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-13T04:45:55.076Z UTC
SHA-25673ee5d8184efa9888efa715814a74f0ba8b4bcda4f90d6ded4e59d5ef6149b4a
Content length568 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0001435049"
  ],
  "period_ending": "2018-12-31",
  "file_num": [
    "001-37345"
  ],
  "display_names": [
    "ADURO BIOTECH, INC.  (CIK 0001435049)"
  ],
  "xsl": null,
  "sequence": 2,
  "root_forms": [
    "10-K"
  ],
  "file_date": "2019-02-27",
  "biz_states": [
    "CA"
  ],
  "sics": [
    "2834"
  ],
  "form": "10-K",
  "adsh": "0001564590-19-004942",
  "film_num": [
    "19638231"
  ],
  "biz_locations": [
    "Berkeley, CA"
  ],
  "file_type": "EX-5.1",
  "file_description": "EX-5.1",
  "inc_states": [
    "DE"
  ],
  "items": []
}

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/45694/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/45694/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/45694/receipt.json