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 — Froman Michael B. G. (2021-03-02) |
|---|---|
| Original URL | https://www.sec.gov/Archives/edgar/data/1141391/000114139121000044/0001141391-21-000044-index.htm |
| Publication | SEC EDGAR |
| Source type | sec_filing |
| Date | 2021-03-02 |
| Entity | Michael Froman |
| Captured | 1970-01-01T00:00:00.000Z UTC |
| Hash computed at | 2026-05-31T03:37:42.691Z UTC |
| SHA-256 | 5f8bcebf013dac689f1124664307e446d13383868a68473a4860ac84b8bc7f72 |
| Content length | 675 bytes |
{
"ciks": [
"0001753077",
"0001141391"
],
"period_ending": "2021-03-01",
"file_num": [
"001-32877"
],
"display_names": [
"Froman Michael B. G. (CIK 0001753077)",
"Mastercard Inc (MA) (CIK 0001141391)"
],
"xsl": "xslF345X03",
"schema_version": "X0306",
"sequence": 1,
"root_forms": [
"4"
],
"file_date": "2021-03-02",
"biz_states": [
"NY"
],
"sics": [
"7389"
],
"form": "4",
"adsh": "0001141391-21-000044",
"film_num": [
"21706755"
],
"biz_locations": [
"",
"Purchase, NY"
],
"file_type": "4",
"file_description": "FORM 4",
"inc_states": [
"",
"DE"
],
"items": []
}
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:
url + '\n' + content and SHA-256 it.Or POST the candidate content to /source/65249/verify and our server will compare for you:
curl -X POST https://www.goblinhouse.net/source/65249/verify \ -H "Content-Type: text/plain" \ --data-binary @document.txt
Companion machine-readable receipt: /source/65249/receipt.json