UnspendableLabs

Horizon Market, the Trustless Bitcoin NFT Marketplace by Unspendable Labs, Revolutionizes NFT Minting and Trading Experience Mint, list, and trade your XCP NFTs on @hznmarket now—no accounts, no emails, totally decentralized. apnews.com/press-release/…

Kontor offers a scalable perpetual file storage system that runs directly on the Bitcoin blockchain, incentivized by KOR emissions. You can find out more here: kontor.network/learn/file-sto…

Kontor achieves 1–2 second confirmations and over 1,000 TPS through optimistic consensus and transaction encoding optimizations, all while relying entirely on Bitcoin for finality.

Creator of @CounterpartyXCP and @kontornetwork drops takes on the various ways Bitcoin metaprotocols may outperform Layer-2s 🌶️ Lots to dig into into this episode, but one clear advantage: they are infinitely simpler, easier to build, and rely on Bitcoin’s existing consensus mechanism for security. We know you’re gonna ask about 10 minute blocks… he has a solve for that too… full ep in comments 👇

Why KONTOR? Here's why...

Bitcoin Native DeFi: The Future of Metaprotocols Adam Krellenstein at @EthereumDenver 2026

BITCOIN RAILS #51: HISTORY OF METAPROTOCOLS ON BITCOIN I with Counterparty Creator @agkrellenstein 🔗 YOUTUBE: youtu.be/vOUubNr3Q44 🌿 SPOTIFY: open.spotify.com/episode/3scwcA… Metaprotocols on Bitcoin have a long and complex history—stretching far before the launch of Ordinals, the most widely used metaprotocol in Bitcoin’s history. Ordinals’ creator @rodarmor credits much of his inspiration to these early projects—including Yoni Assia’s Colored Coins, @ErikVoorhees Satoshi Dice, and of course, @CounterpartyXCP (widely considered the first NFT protocol) developed by Evan Wagner and Adam Krellenstein. While CounterParty was not originally intended for the use of on-chain art, its use for art developed a cult following—used by projects like RarePepes, which remain some of the most valuable NFTs on the market. cc @ScrillaVentura @theog__ In this interview, I sit down with Krellenstein to review the full history of metaprotocols on Bitcoin—the complex history of the first NFT protocol in history—and why, after a long hiatus from Bitcoin, Krellenstein is back in action with metaprotocol @kontornetwork ...with the aim of giving all Layer 2s a run for their money. In this episode, Adam and I cover: - Why early Bitcoin metaprotocols (pre-Ethereum) didn’t take off for DeFi—and what's different today - His personal experiences with @LukeDashjr and the early “spam wars” of 2014 - Why Adam left the Bitcoin space for 8+ years after the creation of Counterparty, and is making a dramatic return with @kontornetwork this past year - The rise of Pepes—and the pros and cons of frogs in pushing forward DeFi metaprotocols - How Kontor is solving the 10-minute block time issue - Why metaprotocols will ultimately outperform Layer 2s for Bitcoin DeFI 🌶️🌶️ This episode of Bitcoin Rails is powered by: — Best In Slot (@bestinslotxyz) - the leading API for Ordinals and BRC-20 data aggregation and indexing. — Spark (@lightspark) - a statechains implementation advancing Bitcoin-powered payments. — Citrea (@citrea_xyz) - a leading Bitcoin rollup technology and BitVM alliance contributor. 📌 TIMESTAMPS: 00:00 Intro 00:25 How Adam Got Into Bitcoin 03:06 Counterparty: Bitcoin’s First Smart-Contract Meta-Protocol 05:01 History of Mastercoin, Smart Contracts & Counterparty 11:12 Why Adam Built Counterparty 14:02 Early Days of NFTs Projects 17:28 Counterparty’s Pivotal Role in Bitcoin’s History 26:23 Proof-of-Burn and Why XCP Exists 33:50 DAO Hack Reversal & Why Bitcoin’s Ethos Still Wins 36:01 NFTs on Counterparty: Rare Pepes & Community Adoption 38:50 How Ordinals Brought Adam Back Intro Bitcoin 43:25 Counterparty in 2024: Governance, Code Decay & Community Rescue 48:09 The Future of Counterparty 50:43 Kontor: Bitcoin’s Next Gen Metra-Protocol 01:02:46 L2 vs Meta-Protocols 01:04:03 Optimistic Verification & BLS Signatures 01:07:38 WASM vs EVM on Bitcoin: Performance & Ecosystem Design 01:15:16 Bitcoin-Secured File Storage: ZK Proofs & the Roadmap Ahead

Counterparty is easily one of the most influential crypto protocol designs — and not just metaprotocol designs — in Bitcoin's history. Arguably the first true “smart contract” system on the market (and this was pre-Ethereum), there are few people on the planet more qualified to share the history of metaprotocols on Bitcoin than Counterparty’s primary architect and creator, @agkrellenstein. We sat down to cover the history of metaprotocols all the way back to Hal Finney [see vid below]. Interview out tomorrow. Drop a follow so you don’t miss it 🔥

Should we plan a Spaces for next week to talk about KAST? Comment below if you're interested in attending. What is KAST? More details can be found here: kontor.network/post/kast-kont…

Bridging the Bitcoin Divide: Introducing Kontor Asset Signature Trusts Kontor solves Bitcoin ecosystem fragmentation by wrapping arbitrary UTXOs into programmable receipt tokens via a FROST-secured Taproot vault, making any metaprotocol asset usable in Kontor smart contracts. Article link below 👇

The history of Counterparty and the future of Kontor! Metaprotocols discussion with @agkrellenstein on The Rollup (@therollupco). Full interview below 👇

KONTOR TECHNICAL DISCUSSION Monday, November 17th at 10:00 AM (EST) I've been working with @UnspendableLabs over the last 6 months, watching this team rejuvenate the Counterparty protocol; introduce a best-in-class wallet and explorer; and build a next-generation metaprotocol on Bitcoin called Kontor. Kontor allows developers to build powerful applications directly on Bitcoin with rich smart contracts and scalable data to Bitcoin. Join us tomorrow morning for a deep-dive! x.com/i/spaces/1ypKd…

Bitcoin’s future is deeper markets, not just payments This is why @kontornetwork is making DeFi and smart contracts native to #Bitcoin 🧵Summary of our latest interview with @agkrellenstein

Counterparty Creator Announces Kontor: a New Metaprotocol for Bitcoin-Native Smart Contracts and Scalable File Storage coinmarketcap.com/community/arti…

Kontor is a next-generation Bitcoin metaprotocol that brings programmable assets and scalable file storage directly to the Bitcoin blockchain. Find out more! KONTOR.NETWORK

Everyone’s been trying to scale Bitcoin off Bitcoin But sidechains, rollups, and L2s break native integration Kontor flips the model: smart contracts that execute directly on #Bitcoin in a single confirmation from your regular wallet @agkrellenstein

Counterparty founder Adam Krellenstein (@agkrellenstein) on stage at Bitcoin Amsterdam discussing the OP_RETURN Wars, scaling challenges and the next-generation KONTOR meta-protocol on Bitcoin.

Join us on Monday, November 17th at 10:00 AM (EST) for a developer discussion on KONTOR. x.com/i/spaces/1ypKd…

The official announcement of KONTOR at Bitcoin Amsterdam 2025. Pictured: Adam Krellenstein. KONTOR.NETWORK

Counterparty Creator Announces Kontor: a New Metaprotocol for Bitcoin-Native Smart Contracts and Scalable File Storage Unspendable Labs, today announced Kontor, a next-generation Bitcoin metaprotocol bringing programmable assets and scalable file storage directly to Bitcoin. Links below...