Osmosis Freezes allBTC: How to Check Whether Your Bridged Bitcoin Is Still Backed

Anyone holding the Bitcoin token allBTC on the Cosmos exchange Osmosis has, since September 9, 2026, owned less Bitcoin on paper than the portfolio display promises. Around 36 percent of the backing stands without real assets behind it, caused by a single one of the five bridge versions that converge in this pooled token, and it applies no matter which version you deposited yourself. This guide shows you how to recalculate your own share, what the announced vote means for you, and how to tell in future whether a token is genuinely backed by Bitcoin. What Happened at Osmosis and Nomic: a Double-Spend Through the Forwarding Logic Nomic operates a blockchain of its own that carries Bitcoin into the Cosmos ecosystem across a bridge. The token issued there is called nBTC and is meant to be backed one to one at all times by real Bitcoin held on the Bitcoin blockchain. A double-spend describes the case in which the same unit of money is spent twice although it exists only once. According to Osmosis, that is exactly what became possible here: a flaw in Nomic's own forwarding mechanism allowed a single deposit to generate multiple vouchers and send them on to Osmosis, where they were exchanged for properly backed holdings. Osmosis said on September 9, 2026 that neither its own chain nor the Inter-Blockchain Communication protocol had been compromised, and that the flaw sat in Nomic's forwarding logic. The distinction matters, because it confines the damage to one component. For you as a holder it changes little about the outcome at first, as the next section shows. The exchange then froze the minting of new allBTC, the redemption into individual bridge tokens, and deposits and withdrawals across the affected rail. Trading in the Bitcoin pools carried on with a risk notice attached. Alloyed BTC Explained: One Pooled Token Out of Five Bridge Versions Alloyed assets are an Osmosis construct that fuses several technically distinct versions of the same underlying into a single tradable token. Instead of running four or five competing Bitcoin tokens side by side, each with its own liquidity, there is one common pot and a share certificate on top of it. That share certificate is called allBTC. The thinking behind it is practical: liquidity does not splinter, prices do not drift apart, and traders need not know which bridge a given Bitcoin once entered through. The price of that convenience is shared liability, and this case makes it visible for the first time. According to several trade publications, five versions flow into the pot behind allBTC: Wrapped Bitcoin in two variants, a Coinbase Wrapped Bitcoin bridged via Axelar, ckBTC from the Internet Computer ecosystem, and Nomic's nBTC.