Chain of custody receipt

Source #43242

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 — Polymarket (2025-11-13)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Polymarket%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2025-11-13
EntityPolymarket
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-13T05:08:53.614Z UTC
SHA-256d799f2dbf6f2c72217a2f68e4f3fa98be8a48fb3347174eea078d8174f4c0e80
Content length620 bytes
Content preview (first 800 chars)
{
  "ciks": [
    "0002096733"
  ],
  "period_ending": null,
  "file_num": [
    "021-563930"
  ],
  "display_names": [
    "OPX2025 Polymarket, a Series of Opulentia Ventures X LLC  (CIK 0002096733)"
  ],
  "xsl": "xslFormDX01",
  "schema_version": "X0708",
  "sequence": 1,
  "root_forms": [
    "D"
  ],
  "file_date": "2025-11-13",
  "biz_states": [
    "VA"
  ],
  "sics": [],
  "form": "D",
  "adsh": "0002096733-25-000001",
  "film_num": [
    "251477709"
  ],
  "biz_locations": [
    "Fairfax, VA"
  ],
  "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/43242/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/43242/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/43242/receipt.json