Chain of custody receipt

Source #68833

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: D — Kalshi Inc. (2021-02-23)
Original URLhttps://www.sec.gov/Archives/edgar/data/1806928/000180692821000001/0001806928-21-000001-index.htm
PublicationSEC EDGAR
Source typesec_filing
Date2021-02-23
EntityKalshi
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-07-14T07:58:54.334Z UTC
SHA-25642cc5d1fdef47773001b90af7d5a1eb4dae5d750a3acfb48dfc078b32fdd0faf
Content length580 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0001806928"
  ],
  "period_ending": null,
  "file_num": [
    "021-390231"
  ],
  "display_names": [
    "Kalshi Inc.  (CIK 0001806928)"
  ],
  "xsl": "xslFormDX01",
  "schema_version": "X0708",
  "sequence": 1,
  "root_forms": [
    "D"
  ],
  "file_date": "2021-02-23",
  "biz_states": [
    "CA"
  ],
  "sics": [],
  "form": "D",
  "adsh": "0001806928-21-000001",
  "film_num": [
    "21665360"
  ],
  "biz_locations": [
    "San Francisco, CA"
  ],
  "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/68833/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/68833/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/68833/receipt.json