Bitcoin testnet4 · Spark REGTEST · no mainnet paths
Creative Bitcoin
🎨 Visual Art · digital sketch archiving

Permanent Sketchbook Hub

Pin your sketchbook pages as immutable IPFS entries to build a lifelong visual diary.

Ordinals inscription (testnet4)· onchain authorship
Section · Onchain

The primitive.

full primer →

Painters inscribe each digital sketch archiving as an Ordinal on Bitcoin testnet4, minting a permanent, wallet-owned inscription ID with the artifact bytes carried directly in the witness.

Why this primitiveWriting the artefact bytes directly into a Bitcoin testnet4 taproot witness mints an ownable inscription that travels with the creator's address.

Kernel
a taproot inscription that writes the artifact bytes directly into a Bitcoin testnet4 witness, minting an inscription ID owned by the creator's address
Drives the UI as
an 'inscribed on Bitcoin' badge with the inscription ID and an ordinals.com testnet preview
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
$1B
digital artist journaling tools
SAM
$270M
sketch archiving apps
SOM
$60M
paid archival storage

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

See also

Adjacent entries.

digital sketch archiving
Sketch Snapshot Chain
Instantly archive and timestamp digital sketches onchain for secure creative journaling.
art materials tracking
Visual Art Supply Chain
Pin supplier certificates and provenance of materials to IPFS for buyer transparency.
metadata automation
Auto-Manifest Builder
Automatically generate and pin complete IPFS manifests for artists’ works with minimal effort.
group project documentation
Collaborative Art Archive
Pin shared artworks and process files to IPFS for permanent collaborative history storage.