Bitcoin testnet4 · Spark REGTEST · no mainnet paths
Creative Bitcoin
🎵 Music & Sound Design · loop exchange

LoopSwap II

Decentralized platform for permanent loop exchange with verified content provenance.

Privy Spark sign-in· bitcoin wallet UX
Section · Onchain

The primitive.

full primer →

Musicians sign in with Google through Privy — no seed phrase, no wallet extension — and Privy mints them a Spark (Bitcoin L2) wallet plus a Bitcoin testnet deposit address in one flow.

Why this primitiveA Privy Spark embedded wallet lets creators sign in with Google and receive a Bitcoin L2 address in one click — no seed phrase, no browser extension.

Kernel
Privy embedded wallet with chainType 'spark' — Google / email sign-in mints a Bitcoin testnet address plus a Spark (Bitcoin L2) address in one flow, no seed phrase, no extension
Drives the UI as
a one-click 'Sign in with Google' that drops the user into the app with a copy-able Spark address and a testnet BTC deposit address
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
$2.1B
loop and sample exchange market
SAM
$600M
digital loop sales
SOM
$45M
producers swapping verified loops

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

See also

Adjacent entries.

loop exchange
LoopSwap
Decentralized platform for permanent loop exchange with verified content provenance.
remix licensing
Onchain Remix Rights II
Enable transparent licensing and royalty splits for remixed tracks directly on the blockchain.
beat collaboration
Collaborative Beat Ledger II
Record and timestamp collaborative beat creation sessions with immutable proof of contribution.
sound libraries
Sound Effect NFT Vault II
Mint and trade exclusive sound effects as NFTs ensuring ownership and monetization for creators.