Chain of custody receipt

Source #4925

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: Korean American Semiconductor Association (EIN: 20-3369350)
Original URL	https://projects.propublica.org/nonprofits/organizations/203369350
Publication	IRS Form 990 via ProPublica Nonprofit Explorer
Source type	`form_990`
Date	2026
Entity	Korea Semiconductor Association
Captured	2026-04-12T17:34:14.667Z UTC
Hash computed at	2026-04-12T17:34:14.667Z UTC
SHA-256	`3c5718e82e8c26200727f1f02f43684a0a30c29ffb8849bfb03cbf566871c751`
Content length	1,586 bytes

Content preview (first 800 chars)

{
  "organization": {
    "id": 203369350,
    "ein": 203369350,
    "name": "Korean American Semiconductor Association",
    "careofname": "% SIMON LEE",
    "address": "41752 CHILTERN DR",
    "city": "Fremont",
    "state": "CA",
    "zipcode": "[ZIP+4 redacted]",
    "exemption_number": 0,
    "subsection_code": 6,
    "affiliation_code": 3,
    "classification_codes": "1000",
    "ruling_date": "2006-06-01",
    "deductibility_code": 2,
    "foundation_code": 0,
    "activity_codes": "000000000",
    "organization_code": 1,
    "exempt_organization_status_code": 1,
    "tax_period": "2023-12-01",
    "asset_code": 0,
    "income_code": 0,
    "filing_requirement_code": 2,
    "pf_filing_requirement_code": 0,
    "accounting_period": 12,
    "asset_amount": 0,
    "income_amount"…

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/4925/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/4925/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/4925/receipt.json