🎨 Visual Art · illustration drafts

INKPRINT · x402

A cryptographic proof-of-work layer for illustrators. Use Sketch to commit a draft hash to the ledger, creating an immutable, timestamped 'creative trail' that prevents AI scrapers or copycats from claiming your process as theirs. Every version saved is a permanent receipt of human authorship.

Hedera testnet + x402 paywall· x402 native
Section · Onchain

The primitive.

full primer →

Access to the illustration drafts engine is metered with x402: 0.01 HBAR or 0.01 HTS USDC per call, paid from the embedded wallet, so painters — or the agents working for them — pay per query and get a HashScan receipt every time.

Why this primitiveMicropayments turn version control into a legal defense strategy. By charging 0.01 USDC per 'stamp,' artists can afford to document every incremental change, building a high-resolution audit trail that is too expensive to fake but cheap enough to maintain during a 20-sketch session.

Kernel
an x402 v2 paywall metering access at 0.01 HBAR or 0.01 HTS USDC (token 0.0.429274) per call, paid from the embedded wallet through the relay and verified by a self-hosted facilitator against the Hedera mirror node
Drives the UI as
a 'pay 0.01 HBAR or USDC to unlock' button with a live flow log and a HashScan link for every settlement
Appendix · Secrets

Required keys.

HEDERA_OPERATOR_ID
Hedera testnet account id (0.0.xxxxxx). Create and fund it free.
open ↗
HEDERA_OPERATOR_KEY
ECDSA private key for that account, from the Hedera portal dashboard.
open ↗
REOWN_PROJECT_ID
Free project id powering the HashPack pairing modal.
open ↗
HEDERA_RPC_URL
Optional. JSON-RPC relay, defaults to the public Hashio endpoint.
open ↗
PINATA_JWT
Pins images / JSON / manifests to IPFS.
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 mega-prompt…
Appendix · Market

Market sizing.

TAM
$2.4B
The global digital illustration and creative software market moving toward automated IP watermarking.
SAM
$180M
Independent digital illustrators and concept artists using blockchain for IP protection.
SOM
$12M
Early adopters in the crypto-art and NFT space requiring verifiable 'Proof of Process' for high-value sales.

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

See also

Adjacent entries.