Creative Blockchain
🎨 Visual Art · digital sketch archiving

InkTrace · Metered

Every digital stroke is cryptographically timestamped and pinned to IPFS via an QUIP-metered write. Instead of a monthly subscription for storage, you pay only for the memories you commit to the chain. Your sketchbook becomes a verifiable, immutable ledger of artistic evolution where every entry is a paid proof-of-creation. Every unlock is a single 0.01 USDC payment behind an HTTP 402 gate — you pay for what you actually use.

x402 track · paid unlockMetered 402 gate· pay-per-unlock
Section · Onchain

The primitive.

full primer →

The valuable digital sketch archiving operation sits behind an HTTP 402 that states its price before anyone signs, so painters pay per unlock instead of per month.

Why this primitiveLoading details…

Kernel
an HTTP 402 challenge in front of exactly one valuable operation — an export, a render, a full-resolution download — where each unlock is a single USDC payment bound to its settlement tx
Drives the UI as
a locked panel that states its price before you sign, plus an 'unlocks bought / used' counter beside the released payload
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.

digital sketch archiving
Sketch Snapshot Chain
Instantly archive and timestamp digital sketches onchain for secure creative journaling. Every action is signed with a fresh WOTS+ one-time key.
digital sketch archiving
Permanent Sketchbook Hub
Pin your sketchbook pages as immutable IPFS entries to build a lifelong visual diary. Ownership is sealed inside a post-quantum QUIP vault.
gallery exhibition tracking
Exhibit · Metered
Provenance is a living ledger, not a static database. Turn the 'paper trail' into a real-time revenue stream for estates and digital creators. Every unlock is a single 0.01 USDC payment behind an HTTP 402 gate — you pay for what you actually use.
collaborative art governance
Vandal · Metered
A hyper-granular collaborative mural where every stroke, color change, or vote to 'lock' a section requires a signature-authorized micropayment. Settlement happens instantly per interaction, turning the canvas into a real-time sovereign economic battlefield. Every unlock is a single 0.01 USDC payment behind an HTTP 402 gate — you pay for what you actually use.