Chain of custody receipt

Source #4110

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 Pride (EIN: 87-3636534)
Original URLhttps://projects.propublica.org/nonprofits/organizations/873636534
PublicationIRS Form 990 via ProPublica Nonprofit Explorer
Source typeform_990
Date2026
EntityLeander
Captured2026-04-12T01:49:46.093Z UTC
Hash computed at2026-04-12T01:49:46.093Z UTC
SHA-2568e7f416f8b54deaea47655e7bc7009ebf2bdc58dee1a38d7849243fc9b69532f
Content length1,547 bytes
Content preview (first 800 chars)
{
  "organization": {
    "id": 873636534,
    "ein": 873636534,
    "name": "Leander Pride",
    "careofname": null,
    "address": "PO BOX 438",
    "city": "Leander",
    "state": "TX",
    "zipcode": "[ZIP+4 redacted]",
    "exemption_number": 0,
    "subsection_code": 3,
    "affiliation_code": 3,
    "classification_codes": "1000",
    "ruling_date": "2022-03-01",
    "deductibility_code": 1,
    "foundation_code": 16,
    "activity_codes": "000000000",
    "organization_code": 5,
    "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,
    "revenue_amount": 0,
    "ntee_code"…

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/4110/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/4110/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/4110/receipt.json