Chain of custody receipt

Source #63809

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 — BlackRock, Inc. (2025-05-08)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22BlackRock%2C%20Inc.%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2025-05-08
EntityBlackRock
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-27T01:44:45.008Z UTC
SHA-25674c804db7638ef2795b26008a3bfba0e36486f2cdbf4ae428d0b0c5aa830610d
Content length580 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0002066265"
  ],
  "period_ending": "2025-03-31",
  "file_num": [
    "028-25547"
  ],
  "display_names": [
    "SSA SWISS ADVISORS AG  (CIK 0002066265)"
  ],
  "xsl": "xslForm13F_X02",
  "sequence": "2",
  "root_forms": [
    "13F-HR"
  ],
  "file_date": "2025-05-08",
  "biz_states": [],
  "sics": [],
  "form": "13F-HR",
  "adsh": "0002066265-25-000001",
  "film_num": [
    "25924610"
  ],
  "biz_locations": [
    "Zurich"
  ],
  "file_type": "INFORMATION TABLE",
  "file_description": "13F SECURITIES LIST",
  "inc_states": [
    "V8"
  ],
  "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/63809/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/63809/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/63809/receipt.json