Creative Blockchain
📷 Photography · color grading

Chromafuel · Pay to Verify

A decentralized colorist engine where every preset application is an on-chain event. The EIP-3009 signature validates the 'Look' metadata, minting a temporary provenance proof for the grade. Professional colorists set up automated fee-streams—every time an AI agent or mobile editor applies their signature style, they are settled instantly on Base. Anyone can pay 0.01 USDC over x402 to verify someone else's QUIP chain and walk away with a receipt.

x402 track · paid unlockPay-per-verify· verification market
Section · Onchain

The primitive.

full primer →

Whoever needs certainty about a color grading — not the creator — pays 0.01 USDC to have the WOTS+ chain replayed, and photographers get a signed verdict receipt they can keep.

Why this primitiveLoading details…

Kernel
a paid verification service where a third party — buyer, festival, insurer — pays 0.01 USDC over x402 to have someone else's WOTS+ chain replayed and gets a signed verdict receipt back
Drives the UI as
a verdict panel with pass/fail per nonce, the local browser verification beside the paid one, and a keepable receipt
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.

color grading
ColorChain Palette
Save and share color grading presets and images as permanent IPFS assets for consistent workflow. Ownership is sealed inside a post-quantum QUIP vault.
color grading
ChainColor Study
Save and share color grading presets onchain without spending gas or complex wallet setup. Every action is signed with a fresh WOTS+ one-time key.
color grading
ColorGrade Chain
Track and prove original photo color grades and presets on-chain. Every action is signed with a fresh WOTS+ one-time key.
photographer profiles
SilverGate · Pay to Verify
Photographers monetize their craft instantly, transforming the traditional gallery into a metered digital exhibition where fans pay per interaction and AI scrapers pay per frame. Anyone can pay 0.01 USDC over x402 to verify someone else's QUIP chain and walk away with a receipt.