1/2 On May 18, 2026, at 10:04 AM UTC, malicious actors attempted to mint tBTC without depositing the underlying Bitcoin (BTC). Their attempts were clearly unsuccessful. No invalid tBTC was issued, and user funds were not at risk.
As a precaution, due to the elevated frequency of malicious activity across the broader crypto ecosystem, Optimistic Minting is temporarily paused. Mints now route through the sweeping mechanism, increasing typical mint time from ~1.5 hours to ~6-7 hours.
ALT Transaction records show multiple deposits of tBTC with corresponding deposit IDs and timestamps from May 18, 2026.