Chain of custody receipt

Source #3660

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.

Title2023 10-K filing
Original URLhttps://www.sec.gov/edgar/browse/?CIK=876883
PublicationDirected Inquiry — Web Search
Source typeweb_search
Date2023-03-06
EntityStagwell Inc
Captured2026-04-11T20:19:45.553Z UTC
Hash computed at2026-04-11T20:19:45.553Z UTC
SHA-256bd88b8e1bd60f5162b5f4f0f69a7b0fdec43d964758c9f1efc8ba84cde107bff
Content length122 bytes
Content preview (first 800 chars) 
Stagwell generally has rights to increase ownership of non-wholly owned subsidiaries to 100% over a defined period of time

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/3660/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/3660/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/3660/receipt.json