Chain of custody receipt

Source #199

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.

TitleResearch: MOSAIC - federal contracts site:usaspending.gov
Original URLhttps://www.usaspending.gov/search/?hash=eyJmaWx0ZXJzIjp7ImtleXdvcmQiOiJNT1NBSUMifX0
PublicationPublic Record Research
Source typediscovery_scope_note
Date2024
EntityMOSAIC
Captured2026-04-05T08:06:06.497Z UTC
Hash computed at2026-04-05T08:06:06.497Z UTC
SHA-256f16b49015cd9af3c8419a759d1193bfa00ea108136a95e5c78564b13fd1da933
Content length628 bytes
Content preview (first 800 chars) 
MOSAIC appears in federal contracting records in multiple contexts, as it is both an acronym used by various government programs and a common contract naming convention. The most prominent federal contract usage relates to IT modernization, data analytics platforms, and interagency service agreements. USASpending.gov tracks federal contract awards, grants, and other financial assistance, where MOSAIC-named contracts span multiple agencies including DHS, HHS, and DOD. Specific verification of individual contract details requires direct database queries as my training data contains limited granular USASpending.gov records.

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/199/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/199/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/199/receipt.json