Ebony is freely tradable on the market without any trade restrictions. Due to the extremely low trade volumes compared to industrially used wood species such as meranti, teak, ipé, bongossi, bangkirai, cumaru, mahogany, there are no certificates for these woods, as available and traded quantities are well below 0.1% (for white ebony even below 0.0001%) of the volume of annual imports of individual other wood species. There is only a CITES-listed protected status for ebony only from Madagascar, the endemic ebony (Diospyros perrieri) there is no longer allowed to be exported. Discussion of the overexploitation of ebony in Madagascar by the musical instrument industry has often led lay people to generalize this trade ban and make no distinction between the rather different species from Madagascar and West Africa. Ebony from the continent of Africa, specifically West Africa is subject to absolutely no trade restriction and does not need to be certified!
One more tip for the success of your work: Ebony, like almost all very hard and dense wood species, tends to crack at end-grain surfaces in very dry and warm rooms, especially with large cross-sections; you must expect the finest cracks to form during processing. Please do not expose the wood to sudden and strong temperature and humidity changes and protect the end grain surfaces with a layer of wax or a thin coat of white glue.