Chain of custody receipt

Source #3935

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: First Look Institute Inc — 2023 (EIN: 80-0951255)
Original URLhttps://projects.propublica.org/nonprofits/organizations/800951255
PublicationIRS Form 990 via ProPublica Nonprofit Explorer
Source typeform_990
Date2023
EntityFirst Look Institute
Captured2026-04-12T01:48:24.992Z UTC
Hash computed at2026-04-12T01:48:24.992Z UTC
SHA-256456c04b2743dcb19bc388c33ba783e228827b51436f2a0018be1e4d76f21a8ed
Content length2,837 bytes
Content preview (first 800 chars)
{
  "organization": {
    "id": 800951255,
    "ein": 800951255,
    "name": "First Look Institute Inc",
    "careofname": null,
    "address": "720 UNIVERSITY AVE STE 110",
    "city": "Los Gatos",
    "state": "CA",
    "zipcode": "[ZIP+4 redacted]",
    "exemption_number": 0,
    "subsection_code": 3,
    "affiliation_code": 3,
    "classification_codes": "1000",
    "ruling_date": "2015-11-01",
    "deductibility_code": 1,
    "foundation_code": 15,
    "activity_codes": "000000000",
    "organization_code": 1,
    "exempt_organization_status_code": 1,
    "tax_period": "2024-12-01",
    "asset_code": 6,
    "income_code": 6,
    "filing_requirement_code": 1,
    "pf_filing_requirement_code": 0,
    "accounting_period": 12,
    "asset_amount": 1787735,
    "income_amount": 1550073…

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/3935/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/3935/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/3935/receipt.json