Chain of custody receipt

Source #10239

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.

TitleThe Citizen Lab research report
Original URLhttps://www.sec.gov/submit-filings/filer-support-resources/how-do-i-guides/file-schedule-13d-schedule-13-g-corresponding-amendments
PublicationDirected Inquiry — Web Search
Source typeweb_search
Date2019-01-01
EntityParagon Solutions
Captured2026-04-14T01:11:14.852Z UTC
Hash computed at2026-04-14T01:11:14.852Z UTC
SHA-25670448fbe7391f09f211523cb092db95f5d15df7ea1b4c10250b1009a0927966d
Content length9,621 bytes
Content preview (first 800 chars)
SEC.gov | File Schedule 13D, Schedule 13G, and Corresponding Amendments

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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/10239/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/10239/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/10239/receipt.json