The　development　of　Internet　of　Things　(IoT)　technology　leads　to　the　continuous　growth　of　IoT　devices.　Due　to　the　characteristics　of　resource　constraints　and　interdependencies,　IoT　devices　are　vulnerable　to　many　security　issues.　Remote　attestation　can　verify　the　integrity　of　remote　devices.　However,　there　are　some　problems　that　exist,　such　as　only　verifying　the　integrity　of　static　and　runtime　data,　attestation　evidence　growing　proportionally　to　the　number　of　services,　resulting　in　significant　increase　in　runtime　overhead.　Therefore,　this　article　proposes　a　blockchain-assisted　integrity　attestation　scheme　for　distributed　dependency　IoT　services.　The　scheme　builds　a　distributed　service　integrity　model　capable　of　measuring　the　integrity　of　both　static　data　and　runtime　data　of　distributed　IoT　services.　In　addition,　we　propose　a　secure　and　trusted　blockchain　query　mechanism,　which　can　effectively　resist　tampering　or　storage　errors　in　the　database　data　of　a　certain　node　in　the　blockchain.　Furthermore,　a　two-way　authentication　distributed　service　integrity　attestation　protocol　is　designed　to　protect　the　communication　security　between　participants　without　excessive　performance　overhead.　We　demonstrate　the　security　of　the　attestation　protocol　with　automated　validation　of　Internet　security　protocols　and　applications.　The　feasibility　and　performance　of　the　proposed　scheme　are　verified　by　simulating　the　Wismote　sensor　using　the　Cooja　simulator.