This paper isolates the confinement spine of Quantum Traction Theory (QTT). The standard confinement facts — no isolated colored particles, Wilson-loop area law in the confining regime, linear static potential, positive pure-gauge mass gap, and full-QCD string breaking into color singlets — are read from one Artian source rule: an asymptotic record must close its A7 modular boundary, and nonzero triadic center charge cannot close locally. Version 3.1 separates the one-adjoint plaquette sanity proxy from the full QTT finite k = 0 singlet-transfer theorem. The proxy is not a glueball theorem; the adjoint-pair singlet transfer (8 ⊗ 8 ⊃ 1) is the closed finite-theorem object used for the 0⁺⁺, 2⁺⁺, 0⁻⁺ rows. Positivity of the QTT k = 0 singlet mass gap is established within the A6-blocked transfer. The paper builds confinement in this order: A5-X supplies completed address events; A6 supplies finite local capacity; A7 supplies bundled completion; equal triadic closure supplies the SU_J(3) color door and its Z₃ center; the finite boundary complex excludes open color from the asymptotic Hilbert sector; a nonzero center boundary forces a center-completion sheet; the local A6 sheet cost gives a Wilson area law; the internally derived QTT three-flavor scale and the A6-blocked center transfer give √σ₃^QTT = 444.253151 MeV (−0.111σ vs static-source 445(3)(6) MeV); and center-neutral adjoint-pair transfers give m(0⁺⁺) = 1.731 GeV (+0.013σ), m(2⁺⁺) = 2.400 GeV (+0.004σ), m(0⁻⁺) = 2.583 GeV (−0.049σ). No observed string tension, glueball mass, hadron mass, fitted vortex density, bag constant, constituent-quark mass, or lattice scale setting is used as a constructor. The status is deliberately scoped: this is a QTT source derivation and no-retune observation-audit paper, not a Clay-style proof inside human invented universe as smooth continuum Yang–Mills. The continuum QCD language is the laboratory shadow; the QTT source is the finite Artian color ledger defined within Artian's universe.