Chain of custody receipt

Source #65092

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.

Title	SEC EDGAR: 4 — BLACKROCK FINANCIAL MANAGEMENT INC (2007-04-03)
Original URL	https://www.sec.gov/Archives/edgar/data/1050112/000120919107021792/0001209191-07-021792-index.htm
Publication	SEC EDGAR
Source type	`sec_filing`
Date	2007-04-03
Entity	BlackRock Financial Management, Inc.
Captured	1970-01-01T00:00:00.000Z UTC
Hash computed at	2026-05-31T02:40:07.638Z UTC
SHA-256	`4fa1c3caaed0f158296767ddd21bdb9923da43571da0723e90dc2e0e18d41bc4`
Content length	706 bytes

Content preview (first 800 chars)

{
  "ciks": [
    "0001050112",
    "0000917129"
  ],
  "period_ending": "2007-03-30",
  "file_num": [
    "001-13937"
  ],
  "display_names": [
    "ANTHRACITE CAPITAL INC  (CIK 0001050112)",
    "BLACKROCK FINANCIAL MANAGEMENT INC  (CIK 0000917129)"
  ],
  "xsl": "xslF345X02",
  "schema_version": "X0202",
  "sequence": 1,
  "root_forms": [
    "4"
  ],
  "file_date": "2007-04-03",
  "biz_states": [
    "NY"
  ],
  "sics": [
    "6798"
  ],
  "form": "4",
  "adsh": "0001209191-07-021792",
  "film_num": [
    "07745532"
  ],
  "biz_locations": [
    "New York, NY",
    "New York, NY"
  ],
  "file_type": "4",
  "file_description": "FORM 4 SUBMISSION",
  "inc_states": [
    "MD"
  ],
  "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:

Take the URL field and the original document content.
Concatenate url + '\n' + content and SHA-256 it.
Compare to the SHA-256 row above.

Or POST the candidate content to /source/65092/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/65092/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/65092/receipt.json