Chain of custody receipt

Source #909

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 — Andreessen Horowitz (a16z) (2026-03-19)
Original URLhttps://www.sec.gov/cgi-bin/browse-edgar?company=Andreessen%20Horowitz%20(a16z)&CIK=&type=&dateb=&owner=include&count=40&search_text=&action=getcompany
PublicationSEC EDGAR
Source typediscovery_scope_note
Date2026-03-19
EntityAndreessen Horowitz (a16z)
Captured2026-04-06T03:10:03.031Z UTC
Hash computed at2026-04-06T03:10:03.031Z UTC
SHA-256e450068b196cbc67898f129b9b11c13b79fd01a9f16cac4b5c69048374b19be6
Content length583 bytes
Content preview (first 800 chars) 
{
  "ciks": [
    "0001800315"
  ],
  "period_ending": "2025-12-31",
  "file_num": [
    "001-39655"
  ],
  "display_names": [
    "Damora Therapeutics, Inc.  (DMRA, GLTO)  (CIK 0001800315)"
  ],
  "xsl": null,
  "sequence": 1,
  "root_forms": [
    "10-K"
  ],
  "file_date": "2026-03-19",
  "biz_states": [
    "MA"
  ],
  "sics": [
    "2834"
  ],
  "form": "10-K",
  "adsh": "0001193125-26-115922",
  "film_num": [
    "26774106"
  ],
  "biz_locations": [
    "Waltham, MA"
  ],
  "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/909/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/909/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/909/receipt.json