Are all major ordinals marketplaces non-custodial?

In 2026, yes — Ordinals Wallet, Magic Eden, Gamma, OKX, Unisat, and Magisat all use the PSBT pattern where your inscription never leaves your wallet until a trade settles. Custodial models exist but are minor and should be avoided.

What’s the simplest way to verify a marketplace is non-custodial?

List an inscription and then check a block explorer — your inscription should still be at the same UTXO under your address. If listing required a transaction that moved the inscription to a new address, the platform is custodial.

Are ETH-bridged ordinals the same thing as Bitcoin Ordinals?

No. A bridged ordinal is a wrapped representation (typically an ERC-721 on Ethereum) backed by an inscription locked in a vault. You’re trading the wrapper, not the inscription itself. Unwrapping requires the vault to honor the redemption, which adds bridge risk and extra transaction costs.

What happens to my ordinal if a marketplace gets hacked?

On a non-custodial venue, your inscription is unaffected because it never left your wallet. The orderbook may go offline and your listing may disappear, but the asset itself is safe. On a custodial venue, a hack can mean partial or total loss.

Can a non-custodial marketplace still steal my ordinal?

Not by holding it — it never had custody. The realistic attack is a compromised UI serving a PSBT that differs from what’s displayed. The defense is reading the PSBT in your wallet before signing — confirm the input UTXO and the destination address.

Why would anyone use a custodial ordinals marketplace?

In practice, almost nobody should. Custodial models trade away the core safety property of Bitcoin (you hold the keys) for convenience benefits (slightly faster UX, listing aggregation) that don’t outweigh the risk.

Bitcoin Ordinals Guide

Self-Custody vs Custodial Ordinals Marketplaces: What the Difference Really Is

Last updated May 12, 2026

TL;DR

A genuinely non-custodial ordinals marketplace never holds your inscription — it stays in your wallet until a trade settles on-chain. Every major venue in 2026 works this way. Custodial alternatives still exist (deposit-then-trade platforms, ETH-bridged vaults) but they trade away Bitcoin's core safety property for marginal convenience. Here's how to tell the difference and what can still go wrong even on a self-custody venue.

What "non-custodial" actually means

Non-custodial means you hold the private key to the wallet that owns the inscription. The marketplace facilitates discovery and matches buyers with sellers, but the asset itself stays at a UTXO you control. A listing is a signature, not a transfer. Only when a buyer accepts the listing does the inscription actually move — and it moves in a single on-chain transaction that the buyer countersigns and broadcasts.

The defining test: if the platform disappeared overnight, would your inscription still be in your wallet? On a non-custodial venue, yes. On a custodial one, you depend on the platform to honor a withdrawal.

The custody patterns you'll encounter

Pure PSBT (every major venue). Listing is a signature; the inscription never leaves your wallet. Trade settles in one Bitcoin transaction.
Deposit-then-trade (custodial). You send the inscription to a platform-controlled address first. Trades happen off-chain on their books. You trust them to honor withdrawals.
Aggregator. A discovery layer that relays trades to underlying non-custodial marketplaces. Custody model inherits from the underlying venue. Verify the underlying.
ETH-bridged / vault. The inscription is locked in a vault contract; you trade an ERC-721 wrapper on Ethereum marketplaces. Bridge risk applies.
Off-chain trading club (rare). Trades tracked off-chain, batch-settled periodically. High counterparty risk between settlement cycles.

Red flags

"Deposit to start trading." A non-custodial venue never asks for this. If listing requires moving the asset to a platform address, walk away.
"Approve" or "permit" prompts.Bitcoin doesn't have token approvals. Any flow that looks like an ERC-20 approval is either bridged (and adds risk) or fraudulent.
Vague custody language."Cold storage on your behalf," "managed wallets," "trade accounts" — all custodial signals.
No PSBT preview.A reputable venue lets your wallet show you exactly what you're signing before you sign.
Unilateral cancellation policies. If a platform claims it can cancel listings on your behalf, custody is involved somewhere.

ETH-bridged ordinals: a special case

A handful of services let you "bridge" an ordinal to Ethereum: you lock the inscription in a vault address, and the service mints an ERC-721 wrapper you can trade on OpenSea, Blur, or other ETH-native marketplaces. The model has two layered risks:

Vault custody. Whoever controls the vault holds the underlying inscription. Smart contract bugs, key compromise, or operator failure can break the redemption guarantee.
Redemption cost.Unwrapping costs both a Bitcoin and an Ethereum transaction. The wrapper's market price can also diverge from the underlying.

As native Bitcoin marketplace liquidity has grown, ETH-bridging has largely fallen out of favor. Most serious traders stay native.

How to verify non-custodial behavior

Note the inscription's UTXO and owning address before you list. Any block explorer can show this (ordinals.com, mempool.space, etc.).
List on the marketplace. Read the PSBT in your wallet before signing — it should show one input (your UTXO) and one output (your own address). Sign.
Refresh the explorer. The inscription should still be at the same UTXO, owned by the same address.
Cancel the listing. No on-chain transaction should be required. If a withdrawal transaction is needed, the platform is custodial.

What can still go wrong on a non-custodial venue

Compromised UI serving malicious PSBT.The marketplace shows "Sign to list inscription #12345 for 0.5 BTC" but the actual PSBT releases a different inscription or sends payment to an attacker. Defense: read every PSBT in your wallet before signing.
Phishing. A clone of the marketplace at a similar URL collects signatures that fund the attacker. Defense: bookmark the real URL and only ever enter through the bookmark.
Orderbook downtime.If the venue goes down, your asset is safe but you can't trade through it until they recover. Cross-listing across multiple venues reduces this risk.
Inscription-spending wallets. If you connect a non-ordinals-aware wallet, it can spend the inscription UTXO as ordinary sats and effectively destroy the inscription. Always use an ordinals-aware wallet.

Frequently asked questions

Are all major ordinals marketplaces non-custodial?: In 2026, yes — Ordinals Wallet, Magic Eden, Gamma, OKX, Unisat, and Magisat all use the PSBT pattern where your inscription never leaves your wallet until a trade settles. Custodial models exist but are minor and should be avoided.
What’s the simplest way to verify a marketplace is non-custodial?: List an inscription and then check a block explorer — your inscription should still be at the same UTXO under your address. If listing required a transaction that moved the inscription to a new address, the platform is custodial.
Are ETH-bridged ordinals the same thing as Bitcoin Ordinals?: No. A bridged ordinal is a wrapped representation (typically an ERC-721 on Ethereum) backed by an inscription locked in a vault. You’re trading the wrapper, not the inscription itself. Unwrapping requires the vault to honor the redemption, which adds bridge risk and extra transaction costs.
What happens to my ordinal if a marketplace gets hacked?: On a non-custodial venue, your inscription is unaffected because it never left your wallet. The orderbook may go offline and your listing may disappear, but the asset itself is safe. On a custodial venue, a hack can mean partial or total loss.
Can a non-custodial marketplace still steal my ordinal?: Not by holding it — it never had custody. The realistic attack is a compromised UI serving a PSBT that differs from what’s displayed. The defense is reading the PSBT in your wallet before signing — confirm the input UTXO and the destination address.
Why would anyone use a custodial ordinals marketplace?: In practice, almost nobody should. Custodial models trade away the core safety property of Bitcoin (you hold the keys) for convenience benefits (slightly faster UX, listing aggregation) that don’t outweigh the risk.