Chain of custody receipt

Source #5162

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.

Title	IRS Form 990: Electronic Frontier Foundation Inc — 2023 (EIN: 04-3091431)
Original URL	https://projects.propublica.org/nonprofits/organizations/43091431
Publication	IRS Form 990 via ProPublica Nonprofit Explorer
Source type	`form_990`
Date	2023
Entity	Electronic Frontier Foundation
Captured	2026-04-12T17:39:05.072Z UTC
Hash computed at	2026-04-12T17:39:05.072Z UTC
SHA-256	`92dc32f07b7a6289283bb5a75344385c9e9310037cb3810920e03784ab2f32b6`
Content length	2,868 bytes

Content preview (first 800 chars)

{
  "organization": {
    "id": 43091431,
    "ein": 43091431,
    "name": "Electronic Frontier Foundation Inc",
    "careofname": "% ANDREA CHAING",
    "address": "815 EDDY ST",
    "city": "San Francisco",
    "state": "CA",
    "zipcode": "[ZIP+4 redacted]",
    "exemption_number": 0,
    "subsection_code": 3,
    "affiliation_code": 3,
    "classification_codes": "1000",
    "ruling_date": "1990-07-01",
    "deductibility_code": 1,
    "foundation_code": 15,
    "activity_codes": "430000000",
    "organization_code": 1,
    "exempt_organization_status_code": 1,
    "tax_period": "2024-06-01",
    "asset_code": 9,
    "income_code": 8,
    "filing_requirement_code": 1,
    "pf_filing_requirement_code": 0,
    "accounting_period": 6,
    "asset_amount": 58374562,
    "income_amount"…

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:

Take the URL field and the original document content.
Concatenate url + '\n' + content and SHA-256 it.
Compare to the SHA-256 row above.

Or POST the candidate content to /source/5162/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/5162/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/5162/receipt.json