Chain of custody receipt

Source #4109

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.

TitleIRS Form 990: Leander Foundation (EIN: 86-2936680)
Original URLhttps://projects.propublica.org/nonprofits/organizations/862936680
PublicationIRS Form 990 via ProPublica Nonprofit Explorer
Source typeform_990
Date2026
EntityLeander
Captured2026-04-12T01:49:46.083Z UTC
Hash computed at2026-04-12T01:49:46.083Z UTC
SHA-256ec12cb129591860f3204caf36ea1153e8ae581cc8ba3b55d7977b5bd8108ccb9
Content length1,583 bytes
Content preview (first 800 chars)
{
  "organization": {
    "id": 862936680,
    "ein": 862936680,
    "name": "Leander Foundation",
    "careofname": "% CARLOS ST JAMES",
    "address": "1817 ARTESIAN SPRINGS XING",
    "city": "Leander",
    "state": "TX",
    "zipcode": "[ZIP+4 redacted]",
    "exemption_number": 0,
    "subsection_code": 3,
    "affiliation_code": 3,
    "classification_codes": "1200",
    "ruling_date": "2021-12-01",
    "deductibility_code": 1,
    "foundation_code": 16,
    "activity_codes": "000000000",
    "organization_code": 1,
    "exempt_organization_status_code": 1,
    "tax_period": "2024-12-01",
    "asset_code": 0,
    "income_code": 0,
    "filing_requirement_code": 2,
    "pf_filing_requirement_code": 0,
    "accounting_period": 12,
    "asset_amount": 0,
    "income_amount": 0…

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/4109/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/4109/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/4109/receipt.json