Chain of custody receipt

Source #39922

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 — Coinbase (2025-10-09)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Coinbase%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2025-10-09
EntityCoinbase
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-13T05:15:17.880Z UTC
SHA-256604e524b12d8f1f028461a5b1eba4f9746eb30602486996b258d5db52a68cc17
Content length583 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0001896677"
  ],
  "period_ending": null,
  "file_num": [
    "333-286374"
  ],
  "display_names": [
    "Grayscale Solana Trust (SOL)  (GSOL)  (CIK 0001896677)"
  ],
  "xsl": null,
  "sequence": "3",
  "root_forms": [
    "S-1"
  ],
  "file_date": "2025-10-09",
  "biz_states": [
    "CT"
  ],
  "sics": [
    "6221"
  ],
  "form": "S-1/A",
  "adsh": "0001193125-25-236053",
  "film_num": [
    "251385838"
  ],
  "biz_locations": [
    "Stamford, CT"
  ],
  "file_type": "EX-10.1",
  "file_description": "EX-10.1",
  "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/39922/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/39922/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/39922/receipt.json