You may be getting a bit complex to “hide” your gltf assets here, there’s a lot of conversations on this forum such as here, here and here plus many more if you Google the approach you are trying, effectively, once a model has been rendered to the screen its practically open and loaded on the client side and with a little determination the webgl renderer buffers can be scraped to grab the model if someone really was keen to get a copy of your models, from what I understand.