Chain of custody receipt

Source #48053

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 — PROMIS (2023-12-27)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22PROMIS%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typesec_filing
Date2023-12-27
EntityPROMIS
Captured1970-01-01T00:00:00.000Z UTC
Hash computed at2026-05-13T04:14:36.745Z UTC
SHA-256886511f16c7594af483249166dd4e3f7819141832616915de1cb697b049d37d0
Content length659 bytes
Content preview (first 800 chars)
{
  "ciks": [
    "0001374339",
    "0001034608"
  ],
  "period_ending": null,
  "file_num": [
    "005-93797"
  ],
  "display_names": [
    "ProMIS Neurosciences Inc.  (PMN)  (CIK 0001374339)",
    "GORDON MICHAEL S  (CIK 0001034608)"
  ],
  "xsl": null,
  "sequence": 1,
  "root_forms": [
    "SC 13G"
  ],
  "file_date": "2023-12-27",
  "biz_states": [
    "A6"
  ],
  "sics": [
    "2834"
  ],
  "form": "SC 13G/A",
  "adsh": "0001104659-23-129406",
  "film_num": [
    "231514525"
  ],
  "biz_locations": [
    "Toronto, A6",
    ""
  ],
  "file_type": "SC 13G/A",
  "file_description": "SC 13G/A",
  "inc_states": [
    "Z4",
    ""
  ],
  "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/48053/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/48053/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/48053/receipt.json