Chain of custody receipt

Source #5157

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: American Immigration Council — 2023 (EIN: 52-1549711)
Original URLhttps://projects.propublica.org/nonprofits/organizations/521549711
PublicationIRS Form 990 via ProPublica Nonprofit Explorer
Source typeform_990
Date2023
EntityAmerican Immigration Council
Captured2026-04-12T17:39:04.705Z UTC
Hash computed at2026-04-12T17:39:04.705Z UTC
SHA-2569bf9d3df921ba7df8cb54c2a972751c4be0b62bb345ef91e41f00e768ed4db40
Content length2,858 bytes
Content preview (first 800 chars) 
{
  "organization": {
    "id": 521549711,
    "ein": 521549711,
    "name": "American Immigration Council",
    "careofname": null,
    "address": "1331 G ST NW STE 200",
    "city": "Washington",
    "state": "DC",
    "zipcode": "[ZIP+4 redacted]",
    "exemption_number": 0,
    "subsection_code": 3,
    "affiliation_code": 3,
    "classification_codes": "1000",
    "ruling_date": "1989-05-01",
    "deductibility_code": 1,
    "foundation_code": 15,
    "activity_codes": "461000000",
    "organization_code": 1,
    "exempt_organization_status_code": 1,
    "tax_period": "2024-12-01",
    "asset_code": 8,
    "income_code": 8,
    "filing_requirement_code": 1,
    "pf_filing_requirement_code": 0,
    "accounting_period": 12,
    "asset_amount": 13669866,
    "income_amount": 12057321…

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/5157/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/5157/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/5157/receipt.json