Watermark Genesis Drop, protected by Watermark

A free NFT for real cardholders.

We're giving away 100 Mumbai stamp NFTs. Tap your bank card once to claim yours. It's free, and we cover the fees.

Claim it in three steps.

1. Tap your card
Tap your RuPay debit card on the Watermark phone app and your wallet gets a stamp. We never store your card number.
2. Send a free test payment
Send one test USDT payment. You just sign it, and we pay the fee.
3. Claim your NFT
We send it straight to your wallet. You don't sign or pay anything.

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Why one per card?

One card stamps one wallet, and each wallet claims once. Bots have no card, so they get nothing. We check a bank card, not who you are.

Why a test payment?

It shows the other half of Watermark: you pay in USDT, and we pay the fee. It's test money on a test network.

Is my card number stored?

No. Our server sees your card data for a moment to make the proof, then wipes it. Your card number never goes on-chain.

Can I give the NFT away?

Yes. Send it to any wallet. The limit is on claiming, not on holding.

Is this real money?

No. It runs on Whitechain Sepolia, a test network.

For builders: how the contract checks the stamp

The NFT contract checks the wallet's stamp on-chain before it mints:

WatermarkGenesisPass.sol

// WatermarkGenesisPass.mint(to), on-chain
(bool ok, uint64 expiresAt) = registry.isStamped(to, appId);
if (!ok) revert NotStamped(to);

The NFT contract checks step 1 on-chain. Step 2 is checked off-chain: our relayer reads the Sponsor's PaymentRelayed events.

Each NFT is a stamp its contract draws on-chain. Your number picks the landmark.

Wallets are free, so bots make thousands of them. Bank cards aren't free.

Any company can add this same check to its own drop.