Chain of custody receipt

Source #3166

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.

TitleJoint development project announcement
Original URLhttps://www.wilsoncenter.org/blog-post/chip-shoulder
PublicationDirected Inquiry — Web Search
Source typeweb_search
Date2015-01-01
EntityHPSP
Captured2026-04-08T20:06:05.362Z UTC
Hash computed at2026-04-08T20:06:05.362Z UTC
SHA-256b9ba9f05253c9d11d12235d42f541d286b395f1955aecf2c4533eb8e8db2819f
Content length134 bytes
Content preview (first 800 chars) 
HPSP has been jointly researching with imec since 2015 to explore benefits of high-pressure annealing on various semiconductor devices

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/3166/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/3166/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/3166/receipt.json