Bitcoin testnet4 · Spark REGTEST · no mainnet paths
Creative Bitcoin
📷 Photography · funding management

Chain-Backed Photo Grants

Manage and distribute photography grant funds transparently on Rootstock testnet smart contracts.

OP_RETURN provenance on testnet4· onchain timestamp
Section · Onchain

The primitive.

full primer →

Funding management gets a SHA-256 anchored into a Bitcoin testnet4 OP_RETURN — photographers see a 'timestamped on Bitcoin' chip and a permanent mempool.space link.

Why this primitiveAnchoring a SHA-256 fingerprint of this artefact in a Bitcoin testnet4 OP_RETURN gives it a wallet-independent, permanent, one-line proof-of-existence.

Kernel
a SHA-256 of any artifact anchored into a Bitcoin testnet4 OP_RETURN output — a one-line, immutable, wallet-independent proof-of-existence
Drives the UI as
a 'timestamped on Bitcoin' chip with block height + a mempool.space testnet4 tx link
Appendix · Secrets

Required keys.

PRIVY_APP_ID
Privy dashboard → your app. Configure with chainType 'spark' to mint Bitcoin L2 wallets on sign-in.
open ↗
PRIVY_APP_SECRET
Server-side. Required for the merchant Spark wallet to observe incoming sats transfers via the Privy RPC.
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 — it carries its own feature spec, code, setup and checklist. read the build strategy →

loading the build spec…
Open in Lovable ↗mempool.space testnet4 ↗
Appendix · Market

Market sizing.

TAM
$500M
photography grants market
SAM
$150M
grant disbursement software
SOM
$15M
photographers receiving funds

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

See also

Adjacent entries.

copyright registry
Immutable Photo Rights
Securely register photo ownership and licensing rights on-chain with immutable proof.
image authenticity
Onchain Photo Proof
Embed verifiable metadata on Rootstock testnet to prove photo authenticity and timestamp creation.
royalty automation
Smart Photo Royalties
Automate and transparently distribute photo royalties directly via Rootstock testnet smart contracts.
collaborative editing
Collaborative Edits Chain
Track photo edit histories and collaborators immutably on Rootstock testnet for transparent teamwork.