Immutable data

Hi, is it possible to achieve with blockstack immutable data storage, so that the owner is no longer able to change the data?

Thanks

Yes, but it’s not easy and it’s not free. You need to break the data into 40K chunks and replicate them to the Atlas network via a sequence of NAME_UPDATE transactions. You will also need to write a client that can re-assemble the chunks back into the data you originally stored. If you’re still interested, see the document on the Atlas network for details.