Chain of custody receipt

Source #60091

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 — Aleksandr Kogan (2026-05-21)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Aleksandr%20Kogan%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2026-05-21
EntityAleksandr Kogan
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-23T00:29:07.772Z UTC
SHA-256c46a8d39d36a38e386ae2d1582f0e8834b0ce95669bf323e865639008a658b66
Content length587 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0002136370"
  ],
  "period_ending": null,
  "file_num": [
    "021-584715"
  ],
  "display_names": [
    "1500 Damen Ashland LLC  (CIK 0002136370)"
  ],
  "xsl": "xslFormDX01",
  "schema_version": "X0708",
  "sequence": 1,
  "root_forms": [
    "D"
  ],
  "file_date": "2026-05-21",
  "biz_states": [
    "IL"
  ],
  "sics": [],
  "form": "D",
  "adsh": "0002136370-26-000001",
  "film_num": [
    "261006257"
  ],
  "biz_locations": [
    "Wilmette, IL"
  ],
  "file_type": "D",
  "file_description": null,
  "inc_states": [
    "IL"
  ],
  "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/60091/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/60091/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/60091/receipt.json