Chain of custody receipt

Source #40471

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 — Trust Stamp (2025-12-16)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Trust%20Stamp%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2025-12-16
EntityTrust Stamp
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-13T05:15:17.880Z UTC
SHA-256938840bf0d17c1d998f54ce34db204b93b104555fb3c0bd7d1154dd17c137a7d
Content length574 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0002034161"
  ],
  "period_ending": null,
  "file_num": [
    "333-292164"
  ],
  "display_names": [
    "Boumarang Inc.  (CIK 0002034161)"
  ],
  "xsl": null,
  "sequence": "5",
  "root_forms": [
    "S-1"
  ],
  "file_date": "2025-12-16",
  "biz_states": [
    "CA"
  ],
  "sics": [],
  "form": "S-1",
  "adsh": "0001096906-25-002059",
  "film_num": [
    "251574457"
  ],
  "biz_locations": [
    "Irvine, CA"
  ],
  "file_type": "EX-10.1",
  "file_description": "LICENSE AGREEMENT AS OF AUGUST 6, 2024",
  "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/40471/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/40471/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/40471/receipt.json