Chain of custody receipt

Source #12890

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 — Unusual Whales (2025-07-21)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Unusual%20Whales%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typeweb_search
Date2025-07-21
EntityUnusual Whales
Captured2026-04-23T06:39:52.149Z UTC
Hash computed at2026-04-23T06:39:52.149Z UTC
SHA-256a579f00020c22a73bc197948c551c0c801ae2041719f50555fb28ca4031bca2f
Content length2,808 bytes
Content preview (first 800 chars)
{"took":692,"timed_out":false,"_shards":{"total":50,"successful":50,"skipped":0,"failed":0},"hits":{"total":{"value":3,"relation":"eq"},"max_score":7.793663,"hits":[{"_index":"edgar_file","_id":"0001437749-24-010302:blkbx20231231_10k.htm","_score":7.793663,"_source":{"ciks":["0001567900"],"period_ending":"2023-12-31","file_num":["001-41051"],"display_names":["BLACKBOXSTOCKS INC. (BLBX) (CIK 0001567900)"],"xsl":null,"sequence":1,"root_forms":["10-K"],"file_date":"2024-04-01","biz_states":["TX"],"sics":["7371"],"form":"10-K","adsh":"0001437749-24-010302","film_num":["24808517"],"biz_locations":["Dallas, TX"],"file_type":"10-K","file_description":"FORM…

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/12890/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/12890/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/12890/receipt.json