Chain of custody receipt

Source #185

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: ImmigrationOS - SEC filing
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22ImmigrationOS%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationPublic Record Research
Source typeweb_search
Date2024
EntityImmigrationOS
Captured2026-04-05T08:03:48.084Z UTC
Hash computed at2026-04-05T08:03:48.084Z UTC
SHA-256a8dd1b3982789a958f109a4bb9c12f2c8707b9b3a8ac39c946de35dd9321087b
Content length1,734 bytes
Content preview (first 800 chars)
{"took":667,"timed_out":false,"_shards":{"total":50,"successful":50,"skipped":0,"failed":0},"hits":{"total":{"value":1,"relation":"eq"},"max_score":4.5321655,"hits":[{"_index":"edgar_file","_id":"0001321655-26-000019:pltr-20260423.htm","_score":4.5321655,"_source":{"ciks":["0001321655"],"period_ending":"2026-06-03","file_num":["001-39540"],"display_names":["Palantir Technologies Inc. (PLTR) (CIK 0001321655)"],"xsl":null,"sequence":1,"root_forms":["DEF 14A"],"file_date":"2026-04-24","biz_states":["FL"],"sics":["7372"],"form":"DEF 14A","adsh":"0001321655-26-000019","film_num":["26890296"],"biz_locations":["Aventura, FL"],"file_type":"DEF 14A","file_description":"DEF…

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/185/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/185/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/185/receipt.json