Chain of custody receipt

Source #221

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.

TitleResearch: Invariant - SEC filing
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Invariant%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationPublic Record Research
Source typeweb_search
Date2024
EntityInvariant
Captured2026-04-05T08:09:28.625Z UTC
Hash computed at2026-04-05T08:09:28.625Z UTC
SHA-256052b26ad680d0c4aa709e5b95ca2186579f85f020f2988f1c3480dade931e34f
Content length57,344 bytes
Content preview (first 800 chars) 
{"took":692,"timed_out":false,"_shards":{"total":50,"successful":50,"skipped":0,"failed":0},"hits":{"total":{"value":225,"relation":"eq"},"max_score":20.449835,"hits":[{"_index":"edgar_file","_id":"0001628280-25-024755:achr-51opinionsx3asrvend.htm","_score":20.449835,"_source":{"ciks":["0001824502"],"period_ending":"2025-03-31","file_num":["001-39668"],"display_names":["Archer Aviation Inc. (ACHR, ACHR-WT) (CIK 0001824502)"],"xsl":null,"sequence":"2","root_forms":["10-Q"],"file_date":"2025-05-12","biz_states":["CA"],"sics":["3721"],"form":"10-Q","adsh":"0001628280-25-024755","film_num":["25935866"],"biz_locations":["San Jose…

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/221/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/221/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/221/receipt.json