Creative Blockchain
🎨 Visual Art · exhibition cataloging

Manifest Hub · x402

A 'Proof of Exhibition' protocol where galleries and curators mint immutable, permanent digital catalogs. Every record committed to the ledger requires a 0.01 USDC x402 trigger, ensuring the archive is spam-resistant and high-signal. Collectors and researchers pay a micropayment to unlock high-res provenance data, with revenue flowing directly to the artists and curatorial staff.

Hedera testnet + x402 paywall· x402 native
Section · Onchain

The primitive.

full primer →

Access to the exhibition cataloging 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 primitiveBy making cataloging a pay-per-entry and pay-per-view system, we turn ephemeral art history into a sustainable on-chain asset class. The x402 primitive replaces expensive physical printing with a low-friction, high-integrity digital alternative.

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…
Hedera testnet HashScan ↗
Appendix · Market

Market sizing.

TAM
$65B
The global traditional art market currently shifting toward digital documentation and blockchain-based provenance.
SAM
$4.2B
The growing market for digital provenance, NFT metadata management, and online art sales platforms.
SOM
$15M
Targeting high-end boutique galleries and independent curators on Hedera who require immutable exhibition archives.

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

See also

Adjacent entries.

exhibition cataloging
Gallery Manifest Hub
Create and pin permanent digital manifests for art gallery exhibitions with immutable records.
art ownership tracking
HardTrace · x402
An on-chain verification layer where creators and galleries pay 0.01 USDC to append or verify high-fidelity provenance events. Trade paper trails for a micro-paid, immutable ledger of truth.
generative art minting
Gen-Seed · x402
A headless seed-to-string engine where 0.01 USDC triggers a unique generative iteration. Instead of a heavy upfront minting fee, users pay per 'Evolution Sign-off.' Artists deploy logic; collectors pay per high-fidelity render, receiving a Hedera transaction id as proof of unique generation. The payment is the shutter click.
gallery exhibition tracking
Exhibit · x402
Provenance is a living ledger, not a static database. Exhibit pays the artist 0.01 USDC every time a curator, insurer, or buyer pulls a verified exhibition history or updates a physical location tag. Turn the 'paper trail' into a real-time revenue stream for estates and digital creators.