Chain of custody receipt

Source #4222

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 — Delian Asparouhov (2021-09-20)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Delian%20Asparouhov%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typeweb_search
Date2021-09-20
EntityDelian Asparouhov
Captured2026-04-12T01:50:35.493Z UTC
Hash computed at2026-04-12T01:50:35.493Z UTC
SHA-25660e48ebc03919f504b3ec3c8fa193f3eda1f7aac22b2314e3bed3b682d717960
Content length1,034 bytes
Content preview (first 800 chars) 
{"took":518,"timed_out":false,"_shards":{"total":50,"successful":50,"skipped":0,"failed":0},"hits":{"total":{"value":0,"relation":"eq"},"max_score":null,"hits":[]},"aggregations":{"entity_filter":{"doc_count_error_upper_bound":0,"sum_other_doc_count":0,"buckets":[]},"sic_filter":{"doc_count_error_upper_bound":0,"sum_other_doc_count":0,"buckets":[]},"biz_states_filter":{"doc_count_error_upper_bound":0,"sum_other_doc_count":0,"buckets":[]},"form_filter":{"doc_count_error_upper_bound":0,"sum_other_doc_count":0,"buckets":[]}},"query":{"_source":{"exclude":["doc_text"]},"query":{"bool":{"must":[{"match_phrase":{"doc_text":"Delian Asparouhov"}}],"must_not":[],"should":[],"filter":[{"terms":{"root_forms":["4","SC 13D","SC 13G","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/4222/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/4222/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/4222/receipt.json