Galaxy Research said a 2013 Casascius 1 BTC coin produced an unusual onchain pattern after its redemption triggered two valid alerts in the same Bitcoin block. The alerts were tied to the same legacy address, but they were not duplicate notifications. Each one came from a separate transaction with a different transaction ID.
According to Galaxy, the redeemed Bitcoin did not permanently leave the monitored address after the first transfer. Part of the proceeds returned to that same legacy wallet, then another transaction spent the funds again before the block closed. Because Galaxy’s monitoring system tracks activity by both wallet address and transaction ID, the two transactions were treated as distinct events and each generated its own alert.
Address reuse inside one block created the rare signal
Galaxy said its anti-repeat alert protection only blocks repeated notifications in subsequent blocks. It does not suppress multiple alerts that occur within a single block. That is what made this case unusual: the same watched address was reused fast enough inside one block to create two legitimate notifications. Galaxy Head of Research Alex Thorn described the activity as unusual, while adding no broader explanation beyond the firm’s live blockchain monitoring.
The research team also noted that the legacy address had received two separate one-satoshi dust deposits before the redemption. Those tiny amounts stayed in the wallet until the Casascius coin moved. In total, the redemption transferred 1.00000002 BTC, including the dust. Galaxy said 0.99899300 BTC then returned to the same address and was spent again in another transaction, which produced the second alert.
Bitcoin traded near support during the onchain event
At the time of the activity, Bitcoin was trading near $62,900. The chart showed a modest rebound after the asset had fallen toward the $59,000 area earlier. Immediate support was seen near $60,000, followed by $57,800. Resistance levels were identified around $67,900 and $72,900, with stronger resistance near the declining 200-day moving average in the $76,000 to $78,000 range.
Galaxy added that the 50-day moving average remained below the 200-day moving average, pointing to a broader bearish trend. The notable part of this episode was not a new market catalyst, but the chain behavior itself: a redeemed physical Bitcoin briefly returned to the same legacy address and was spent again in the same block, leaving behind a rare double-alert sequence.