Chain of custody receipt

Source #3847

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 — Blackrock Neurotech (2023-02-23)
Original URLhttps://efts.sec.gov/LATEST/search-index?q=%22Blackrock%20Neurotech%22&dateRange=custom&forms=4,SC%2013D,SC%2013G,DEF%2014A,10-K,10-Q
PublicationSEC EDGAR
Source typeweb_search
Date2023-02-23
EntityBlackrock Neurotech
Captured2026-04-12T01:48:05.617Z UTC
Hash computed at2026-04-12T01:48:05.617Z UTC
SHA-256924d60226a304d9b658c6fd5b8dfd6bdc1dd0b7dd952737e41df4f038b0bce89
Content length2,258 bytes
Content preview (first 800 chars)
{"took":400,"timed_out":false,"_shards":{"total":50,"successful":50,"skipped":0,"failed":0},"hits":{"total":{"value":2,"relation":"eq"},"max_score":6.0464916,"hits":[{"_index":"edgar_file","_id":"0001285550-23-000020:clpt-20221231.htm","_score":6.0464916,"_source":{"ciks":["0001285550"],"period_ending":"2022-12-31","file_num":["001-34822"],"display_names":["ClearPoint Neuro, Inc. (CLPT) (CIK 0001285550)"],"xsl":null,"sequence":1,"root_forms":["10-K"],"file_date":"2023-03-01","biz_states":["CA"],"sics":["3841"],"form":"10-K","adsh":"0001285550-23-000020","film_num":["23694843"],"biz_locations":["Solana Beach…

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/3847/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/3847/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/3847/receipt.json