P ProofPay
Source ↗ Read-only by default · Arbitrum Sepolia registry live

VERIFIABLE WORK-PAYMENT RECEIPTS · ARBITRUM-FIRST

Verify the transfer. Keep the receipt. Anchor the proof.

ProofPay checks canonical stablecoin transfers from public blockchain data, creates a portable receipt, and prepares a privacy-conscious digest for optional anchoring on Arbitrum. Read-only verification never asks for a wallet.

01 · Verify

Check a stablecoin payment

Arbitrum-first

Only a public transaction hash is sent to the selected network’s public RPC endpoint. The live verifier currently recognizes canonical USDC; the safe demo shows the USDG receipt format used for the Arbitrum build.

01

Read public data

Fetch the confirmed transaction receipt from the network’s public JSON-RPC endpoint.

02

Match canonical USDC

Decode only Transfer logs emitted by Circle’s native USDC contract on that network.

03

Commit only the digest

Export the receipt and optionally anchor its deterministic hash without publishing invoice text.

BUILT FOR REAL WORK

Evidence for freelancers, grant teams, and crypto-native operations.

CLEAR BUILD BOUNDARY

Verification stays useful without a wallet.

The read-only transaction parser predates the Arbitrum build. The deterministic receipt commitment, mutation detection, registry contract, and anchoring preparation are the new Arbitrum layer. Anchoring remains optional and must be reviewed and signed by the user.