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: filing — Jan Koum (2017-08-17) |
|---|---|
| Original URL | https://efts.sec.gov/LATEST/search-index?q=%22Jan%20Koum%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q |
| Publication | SEC EDGAR |
| Source type | sec_filing |
| Date | 2017-08-17 |
| Entity | Jan Koum |
| Captured | 1970-01-01T00:00:00.000Z UTC |
| Hash computed at | 2026-05-13T04:18:48.919Z UTC |
| SHA-256 | b2d37cb771d81d633099a5fdc3118b0da1f3c99c5b1528aeab099fd301d68886 |
| Content length | 676 bytes |
{
"ciks": [
"0001621141",
"0001326801"
],
"period_ending": "2017-08-15",
"file_num": [
"001-35551"
],
"display_names": [
"Koum Jan (CIK 0001621141)",
"Facebook Inc (META) (CIK 0001326801)"
],
"xsl": "xslF345X03",
"schema_version": "X0306",
"sequence": 1,
"root_forms": [
"4"
],
"file_date": "2017-08-17",
"biz_states": [
"CA"
],
"sics": [
"7370"
],
"form": "4",
"adsh": "0001127602-17-025978",
"film_num": [
"171039967"
],
"biz_locations": [
"",
"Menlo Park, CA"
],
"file_type": "4",
"file_description": "PRIMARY DOCUMENT",
"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/46611/verify and our server will compare for you:
curl -X POST https://www.goblinhouse.net/source/46611/verify \ -H "Content-Type: text/plain" \ --data-binary @document.txt
Companion machine-readable receipt: /source/46611/receipt.json