Chain of custody receipt

Source #41325

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 Financial Management, Inc. (2011-12-21)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22BlackRock%20Financial%20Management%2C%20Inc.%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2011-12-21
EntityBlackRock Financial Management, Inc.
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-13T05:13:47.632Z UTC
SHA-256f50b85b57c34416ec13d17cd4d864ebaab01d6404631742f57ea998f35765544
Content length624 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0001536652"
  ],
  "period_ending": null,
  "file_num": [
    "021-170501"
  ],
  "display_names": [
    "BlackRock Mortgage Investors REIT Inc.  (CIK 0001536652)"
  ],
  "xsl": "xslFormDX01",
  "schema_version": "X0704",
  "sequence": 1,
  "root_forms": [
    "D"
  ],
  "file_date": "2011-12-21",
  "biz_states": [
    "NY"
  ],
  "sics": [],
  "form": "D",
  "adsh": "0001536652-11-000001",
  "film_num": [
    "111274603"
  ],
  "biz_locations": [
    "New York, NY"
  ],
  "file_type": "D",
  "file_description": null,
  "inc_states": [
    "DE"
  ],
  "items": [
    "06",
    "3C",
    "3C.7"
  ]
}

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/41325/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/41325/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/41325/receipt.json