Chain of custody receipt

Source #3310

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.

TitleNYC Comptroller office formal letter to Palantir Board
Original URLhttps://libguides.nypl.org/trademarks/trademark_application
PublicationDirected Inquiry — Web Search
Source typeweb_search
Date2026-02-04
EntityMark D. Levine
Captured2026-04-09T14:03:11.859Z UTC
Hash computed at2026-04-09T14:03:11.859Z UTC
SHA-256360b4c05ce4555d16f36a03ed8cb96adceaadb8551aa8b85d87a252d224a8cb6
Content length131 bytes
Content preview (first 800 chars) 
New York City Comptroller Mark D. Levine requested independent third-party human rights risk assessment of Palantir's DHS contracts

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/3310/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/3310/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/3310/receipt.json