Chain of custody receipt

Source #43210

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 — Grayscale Bitcoin ETF (GBTC) (2026-01-22)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Grayscale%20Bitcoin%20ETF%20(GBTC)%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2026-01-22
EntityGrayscale Bitcoin ETF (GBTC)
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-13T05:08:53.614Z UTC
SHA-2563d8e1f825f2a1a826c6807f62985522c3dd60caef70e2e83f5327ec3073ec828
Content length582 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0002065136"
  ],
  "period_ending": "2024-03-31",
  "file_num": [
    "028-25618"
  ],
  "display_names": [
    "Ransom Advisory, Ltd  (CIK 0002065136)"
  ],
  "xsl": "xslForm13F_X02",
  "sequence": "2",
  "root_forms": [
    "13F-HR"
  ],
  "file_date": "2026-01-22",
  "biz_states": [
    "RI"
  ],
  "sics": [],
  "form": "13F-HR",
  "adsh": "0002065136-26-000002",
  "film_num": [
    "26550284"
  ],
  "biz_locations": [
    "Providence, RI"
  ],
  "file_type": "INFORMATION TABLE",
  "file_description": null,
  "inc_states": [
    "RI"
  ],
  "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/43210/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/43210/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/43210/receipt.json