Bitcoin testnet4 · Spark REGTEST · no mainnet paths
Creative Bitcoin
🎵 Music & Sound Design · peer review

Decentralized Music Feedback

Collect transparent, timestamped peer reviews for music tracks to build trust and credibility.

OP_RETURN provenance on testnet4· onchain timestamp
Section · Onchain

The primitive.

full primer →

Peer review gets a SHA-256 anchored into a Bitcoin testnet4 OP_RETURN — musicians 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
$1.3B
peer review music platforms
SAM
$350M
online music feedback
SOM
$40M
blockchain feedback users

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

See also

Adjacent entries.

sample tracking
Loop Provenance
Track and verify original creators of music loops and samples to credit and reward authors accurately.
remix licensing
Onchain Remix Rights
Enable transparent licensing and royalty splits for remixed tracks directly on the blockchain.
beat collaboration
Collaborative Beat Ledger
Record and timestamp collaborative beat creation sessions with immutable proof of contribution.
sound libraries
Sound Effect NFT Vault
Mint and trade exclusive sound effects as NFTs ensuring ownership and monetization for creators.