Chain of custody receipt

Source #5392

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 — VoltaGrid (2021-01-22)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22VoltaGrid%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typeweb_search
Date2021-01-22
EntityVoltaGrid
Captured2026-04-12T17:40:28.379Z UTC
Hash computed at2026-04-12T17:40:28.379Z UTC
SHA-256dd0be49fae45ff63a60e60598847eda15ec8c5e19bfb95e2648812d5d0aed52f
Content length19,331 bytes
Content preview (first 800 chars)
{"took":981,"timed_out":false,"_shards":{"total":50,"successful":50,"skipped":0,"failed":0},"hits":{"total":{"value":33,"relation":"eq"},"max_score":16.308405,"hits":[{"_index":"edgar_file","_id":"0000018230-26-000008:cat_exx21x12312025subsidia.htm","_score":16.308405,"_source":{"ciks":["0000018230"],"period_ending":"2025-12-31","file_num":["001-00768"],"display_names":["CATERPILLAR INC (CAT) (CIK 0000018230)"],"xsl":null,"sequence":"3","root_forms":["10-K"],"file_date":"2026-02-13","biz_states":["TX"],"sics":["3531"],"form":"10-K","adsh":"0000018230-26-000008","film_num":["26629599"],"biz_locations":["Irving, TX"],"file_type":"EX-21","file_description":"EX-21…

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/5392/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/5392/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/5392/receipt.json