Chain of custody receipt

Source #44775

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 — American Federation of Teachers (AFT) (2021-03-15)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22American%20Federation%20of%20Teachers%20(AFT)%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2021-03-15
EntityAmerican Federation of Teachers (AFT)
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-13T05:01:59.649Z UTC
SHA-256fe94719577b4300139beffdc41453ef1d032f8f9776375dac7d29d4e15e313f4
Content length580 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0001823608"
  ],
  "period_ending": "2020-12-31",
  "file_num": [
    "001-40136"
  ],
  "display_names": [
    "Amalgamated Financial Corp.  (AMAL)  (CIK 0001823608)"
  ],
  "xsl": null,
  "sequence": 1,
  "root_forms": [
    "10-K"
  ],
  "file_date": "2021-03-15",
  "biz_states": [
    "NY"
  ],
  "sics": [
    "6022"
  ],
  "form": "10-K",
  "adsh": "0001823608-21-000010",
  "film_num": [
    "21740173"
  ],
  "biz_locations": [
    "New York, NY"
  ],
  "file_type": "10-K",
  "file_description": "10-K",
  "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/44775/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/44775/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/44775/receipt.json