Chain of custody receipt

Source #5820

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: Chamber Of Digital Commerce — 2022 (EIN: 47-1183361)
Original URLhttps://projects.propublica.org/nonprofits/download-filing?path=download990pdf_12_2023_prefixes_46-47%2F471183361_202212_990O_2023120122042147.pdf
PublicationIRS Form 990 via ProPublica Nonprofit Explorer
Source typeform_990
Date2022
EntityDigital Chamber
Captured2026-04-12T23:12:45.193Z UTC
Hash computed at2026-04-12T23:12:45.193Z UTC
SHA-2560457b8bcb6992552e99549f2f0bca92d57c33d98948fd0edc71e978a90c688ed
Content length2,966 bytes
Content preview (first 800 chars)
{
  "organization": {
    "id": 471183361,
    "ein": 471183361,
    "name": "Chamber Of Digital Commerce",
    "careofname": null,
    "address": "1667 K ST NW STE 640",
    "city": "Washington",
    "state": "DC",
    "zipcode": "[ZIP+4 redacted]",
    "exemption_number": 0,
    "subsection_code": 6,
    "affiliation_code": 3,
    "classification_codes": "2000",
    "ruling_date": "2014-09-01",
    "deductibility_code": 2,
    "foundation_code": 0,
    "activity_codes": "000000000",
    "organization_code": 1,
    "exempt_organization_status_code": 1,
    "tax_period": "2024-12-01",
    "asset_code": 7,
    "income_code": 6,
    "filing_requirement_code": 1,
    "pf_filing_requirement_code": 0,
    "accounting_period": 12,
    "asset_amount": 8079133,
    "income_amount": 4498020…

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/5820/verify and our server will compare for you:

curl -X POST https://www.goblinhouse.net/source/5820/verify \
  -H "Content-Type: text/plain" \
  --data-binary @document.txt

Companion machine-readable receipt: /source/5820/receipt.json