Creative Blockchain
📷 Photography · photo metadata

TAGS · Paid Certificate

A high-throughput API for immutable image provenance. Perfect for mobile apps and AI scrapers requiring instant, micro-fee attestation without holding native GAS. Payment triggers the instant EIP-3009 transfer and metadata commit. Paying 0.01 USDC over x402 returns a signed provenance certificate for the work.

x402 track · paid unlockPaid provenance certificate· signed receipt
Section · Onchain

The primitive.

full primer →

One 0.01 USDC payment turns the photo metadata record into a signed certificate photographers can email, attach or archive — and the page proves who signed it without asking anyone to trust the server.

Why this primitiveLoading details…

Kernel
a 0.01 USDC payment over x402 that returns a relayer-signed provenance certificate over the WOTS+ head — a portable document anyone can verify without trusting the issuer
Drives the UI as
a certificate card with the signed fields, the issuing signer, and a 'recover signer' check that runs in the browser
Appendix · Secrets

Required keys.

METAMASK_PRIVATE_KEY
Deploys the QUIP verifier to your host chain. Fund on Sepolia via the Google Cloud faucet.
open ↗
SEPOLIA_RPC_URL
Host-chain HTTPS RPC endpoint. Any Sepolia provider works.
open ↗
ETHERSCAN_API_KEY
Required for npx hardhat verify after deploy.
open ↗

Add these in your Lovable project under Settings → Secrets before pasting the prompt below.

Appendix · Mega-prompt

The build prompt.

Paste into a fresh Lovable project. Make sure all five secrets above are set first. read the build strategy →

Loading the build prompt…
Open in Lovable ↗Sepolia Etherscan ↗
Appendix · Market

Market sizing.

TAM
…
SAM
…
SOM
…

Indicative figures for hackathon pitches — refine with your own research before raising.

See also

Adjacent entries.

photo metadata
Gasless Metadata Tags
Add and sync photo metadata onchain without gas fees or wallet complications. The creator's existing wallet is wrapped with a post-quantum commitment.
photo metadata
Chain-Verified EXIF
Verify and store immutable EXIF data onchain without wallet or gas barriers. Ownership is sealed inside a post-quantum QUIP vault.
image authenticity
TrueLens · Paid Certificate
A pay-per-seal protocol for photographers. Instead of a subscription, users pay only for 'Truth-as-a-Service,' generating a cryptographically verifiable 'Proof of Origin' receipt. Protect your IP and verify reality in an era of Deepfakes, one cent at a time. Paying 0.01 USDC over x402 returns a signed provenance certificate for the work.
photo prints trading
ProofSheet · Paid Certificate
Eliminate listing fees and gas friction by making digital ownership a metered utility. Collectors pay-per-view to unlock raw file access, and pay-per-hop to route shipping data to print houses, with every state change settled via a signed EIP-3009 micropayment. Paying 0.01 USDC over x402 returns a signed provenance certificate for the work.