Chain of custody receipt

Source #66910

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: S-1/A — RMG Acquisition Corp. IV (2021-10-14)
Original URLhttps://www.sec.gov/Archives/edgar/data/1847455/000119312521298408/0001193125-21-298408-index.htm
PublicationSEC EDGAR
Source typesec_filing
Date2021-10-14
EntityRMG Acquisition Corp. IV
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-06-01T01:44:56.735Z UTC
SHA-25691cbfec04f9efe50bf7b4a886e96696bb534e67c9b4059bc590bc3ff469668ce
Content length567 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0001847455"
  ],
  "period_ending": null,
  "file_num": [
    "333-253637"
  ],
  "display_names": [
    "RMG Acquisition Corp. IV  (CIK 0001847455)"
  ],
  "xsl": null,
  "sequence": 4,
  "root_forms": [
    "S-1"
  ],
  "file_date": "2021-10-14",
  "biz_states": [
    "NY"
  ],
  "sics": [
    "6770"
  ],
  "form": "S-1/A",
  "adsh": "0001193125-21-298408",
  "film_num": [
    "211322661"
  ],
  "biz_locations": [
    "New York, NY"
  ],
  "file_type": "EX-5.1",
  "file_description": "EX-5.1",
  "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/66910/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/66910/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/66910/receipt.json