▁series ▁are ▁often ▁introduced ▁in ▁the ▁database ▁by ▁different ▁people , ▁resulting ▁in ▁incons istent ▁sp elling ▁and ▁naming ▁convent ions ▁across ▁disc s . ▁ ▁the ▁database ▁held ▁just ▁under ▁ 2 , 0 0 0 , 0 0 0 ▁CD s . ▁As ▁of ▁ 2 0 0 7 , ▁Music Brainz ▁– ▁a ▁project ▁with ▁similar ▁goals ▁– ▁had ▁a ▁fre ed b ▁gateway ▁that ▁allowed ▁access ▁to ▁their ▁own ▁database . ▁The ▁gateway ▁was ▁shut down ▁on ▁March ▁ 1 8 , ▁ 2 0 1 9 . ▁ ▁History ▁ ▁The ▁original ▁software ▁behind ▁CD DB ▁was ▁released ▁under ▁the ▁GNU ▁General ▁Public ▁License , ▁and ▁many ▁people ▁submitted ▁CD ▁information ▁thinking ▁the ▁service ▁would ▁also ▁remain ▁free . ▁The ▁license ▁was ▁later ▁changed , ▁however , ▁and ▁some ▁program mers ▁compla ined ▁that ▁the ▁new ▁license ▁included ▁certain ▁terms ▁that ▁they ▁couldn ' t ▁accept : ▁if ▁one ▁wanted ▁to ▁access ▁CD DB , ▁one ▁was ▁not ▁allowed ▁to ▁access ▁any ▁other ▁CD DB - like ▁database ▁( such ▁as ▁fre ed b ), ▁and ▁any ▁programs ▁using ▁a ▁CD DB ▁lookup ▁had ▁to ▁display ▁a ▁CD DB ▁logo ▁while ▁performing ▁the ▁lookup . ▁ ▁In ▁March ▁ 2 0 0 1 , ▁CD DB , ▁now ▁owned ▁by ▁G rac en ote , ▁b anned ▁all ▁un lic ensed ▁applications ▁from ▁accessing ▁their ▁database . ▁New ▁lic enses ▁for ▁CD DB 1 ▁( the ▁original ▁version ▁of ▁CD DB ) ▁were ▁no ▁longer ▁available , ▁since