According to Odaily, Fractal Bitcoin announced on X that it has completed the reset of its testnet phase and officially launched its public testnet. Alongside this development, Fractal nodes have now been open-sourced, and OP_CAT has been successfully activated. Additionally, the brc-20 on Fractal will be activated at block height 21,000, which is expected to be reached in approximately seven days. Only inscriptions made after this block height will be considered valid.