A Dutch anti-piracy group says that its battle with two local Internet service providers over a blockade of The Pirate Bay is not over yet. Despite having its censorship demands thrown out by The Court of The Hague, BREIN says it will take its case to the Supreme Court, a process that could take as long as 18 months to complete.

Following a 2010 attempt by Dutch anti-piracy group BREIN to force local ISP Ziggo to block The Pirate Bay, rival ISP XS4ALL joined in the fight against the Hollywood-funded group. Initially a court decided that the ISPs wouldn’t have to block the site, but BREIN took the case to a full trial – and won.

On appeal the verdict swung in favor of the ISPs after they successfully argued that the blockade was ineffective and denied subscribers’ free access to information. January 28, 2014, marked a big day in the Netherlands for both The Pirate Bay and its millions of fans, despite neither party’s involvement in the just-completed legal proceedings.

BREIN, on the other hand, went away licking its wounds and contemplating its 326,000 euro ($445,000) legal bill. Neither ISP wasted time unblocking The Pirate Bay.

With the verdict handed down and The Pirate Bay unblocked, the next step in the battle, should there even be one, lay in BREIN’s hands.

Now, three weeks later, the anti-piracy group has signaled its intention to fight on, criticizing The Court of The Hague’s ruling that site blocking should be dismissed if it’s ineffective.

“That statement is at odds with the opinion of judges in other European countries on blocking and preempts the judgment of the highest European court which is expected shortly. BREIN’s claim is that service providers blocking access to illegal websites has already been assigned by the court,” the group said in a statement.

BREIN adds that it has already established a number of grounds for appeal and will take its case to the Supreme Court.

“Depending on the type of appeal it can take a year to eighteen months before a decision,” BREIN chief Tim Kuik told Tweakers. “Moreover, there are still questions for the European Court of Justice so it might take even longer.”

In the wake of the Ziggo and XS4ALL victory, UPC, the Netherlands’ second largest ISP, said that it had reached an agreement with BREIN over its blocking of The Pirate Bay. The company said it would suspend the block, pending the outcome of its own case with the anti-piracy group.

Commenting on that development Friday, Kuik said that only the Supreme Court can provide the final answers. Taking further legal action now makes no sense, he said, as it only “makes the lawyers richer.”