The latest articles on DEV Community by EL E (@el_e_3dc94dfc336bfb025ef2). https://dev.to/el_e_3dc94dfc336bfb025ef2 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4108909%2F106b50e5-6589-4505-b434-7d0439d77d1e.png https://dev.to/el_e_3dc94dfc336bfb025ef2 en EL E Fri, 04 Sep 2026 02:36:00 +0000 https://dev.to/el_e_3dc94dfc336bfb025ef2/stop-trusting-screenshots-verify-crypto-payments-and-prove-your-reports-are-untouched-1ja8 https://dev.to/el_e_3dc94dfc336bfb025ef2/stop-trusting-screenshots-verify-crypto-payments-and-prove-your-reports-are-untouched-1ja8 <p>If you accept crypto (USDT-TRC20) for freelance or digital goods, you've probably been handed a "proof of payment" that was just a screenshot — editable, unverifiable, sometimes a fake TRC20 token.</p> <p>Here are two open-source (MIT) tools I use to close that gap:</p> <h2> 1. Verify the payment actually landed </h2> <p><code>usdt-receipt-verifier</code> is read-only: give it your address + expected amount + min confirmations, and it checks the chain through a local Tor proxy (no real-IP leak), then writes a tamper-evident receipt. It issues no transaction and never sees your key.</p> <h2> 2. Prove your deliverable report wasn't edited later </h2> <p><code>integrity-chain</code> turns a report/attestation into a signed hash-chain. An independent verifier re-derives every link and flags tampering or "fake live" claims. Self-test shows honest chains PASS, tampered/fake-live FAIL.</p> <p>Both are local-first, zero real IP, no keys.</p> <h2> Try it yourself — zero install, offline, no account </h2> <ul> <li> <strong>usdt-receipt-verifier</strong> — <a href="https://github.com/elwakeupman-shhh/usdt-receipt-verifier" rel="noopener noreferrer">https://github.com/elwakeupman-shhh/usdt-receipt-verifier</a> <code>python usdt_receipt_verifier.py --selftest</code> </li> <li> <strong>integrity-chain</strong> — <a href="https://github.com/elwakeupman-shhh/offchain-integrity-verifier" rel="noopener noreferrer">https://github.com/elwakeupman-shhh/offchain-integrity-verifier</a> <code>pip install -r requirements.txt</code> then <code>python verify_cli.py --selftest</code> </li> </ul> <p>Both exit 0 on honest data and non-zero on tampered/fake-live data — prove it yourself.</p> <p>Contact: open a GitHub issue on either repo above.</p> crypto security opensource python