{
  "tool_id": "art-365-compute-globe-topup-tax",
  "kernel_id": "art-365-compute-globe-topup-tax",
  "display_name": "GloBE Top-Up Tax & QDMTT Allocation Calculator",
  "tool_version": "1.0.0",
  "mandate_type": "compliance_mandate",
  "purpose": "OECD Pillar Two GloBE top-up tax calculator: per-jurisdiction substance-based income exclusion (SBIE), effective tax rate (ETR), and top-up-rate/top-up-amount, then allocates the top-up across QDMTT, IIR, and UTPR, applying the OECD Side-by-Side Safe Harbour (approved/declassified 5 January 2026) when the caller declares a Central Record listing of a Qualified SbS Regime, a Filing Constituent Entity election, and a fiscal year on or after 1 January 2026 -- when it applies, Top-up Tax is deemed zero for both the IIR and the UTPR. Ports the calculation from tools/473-globe-etr-jurisdiction-calculator.html and tools/474-topup-tax-qdmtt-calculator.html into one provable kernel. SBIE payroll/asset rates and the 15% minimum rate are OECD-published transitional table values pinned behind a constants_version field -- a rate change is a version bump, never a silent recompute. Jurisdiction-level QDMTT enactment/rate and the Central Record listing are caller-supplied, never vendored. KNOWN-WRONG (comment only, not behaviour, recorded 2026-08-17 per ART9-CITATION-FIX-1): the kernel source at chaingraph/kernels/art-365-compute-globe-topup-tax.kernel.mjs line 49 cites the SBIE transitional rates as 'Art. 9.1' -- the correct citation is Art. 9.2 (Art. 9.1 is Tax Attributes Upon Transition; Art. 9.2 is the Transitional relief for the Substance-based Income Exclusion, per research/ART9-NUMBERING-CONFIRM-1.md and research/ART9-NUMBERING-DENY-1.md). This node is sealed (compute_proof_ready: ready) so the kernel comment is left uncorrected per SO #36 -- no GPU re-prove for a comment. The kernel's behaviour is correct and cleared ART-365-SIDEBYSIDE-1 with zero divergences; fix the comment only if art-365 is ever legitimately re-proved for another reason.",
  "control_description": "OECD Pillar Two GloBE top-up tax calculator: per-jurisdiction substance-based income exclusion (SBIE), effective tax rate (ETR), and top-up-rate/top-up-amount, then allocates the top-up across QDMTT, IIR, and UTPR, applying the OECD Side-by-Side Safe Harbour (approved/declassified 5 January 2026) when the caller declares a Central Record listing of a Qualified SbS Regime, a Filing Constituent Entity election, and a fiscal year on or after 1 January 2026 -- when it applies, Top-up Tax is deemed zero for both the IIR and the UTPR. Ports the calculation from tools/473-globe-etr-jurisdiction-calculator.html and tools/474-topup-tax-qdmtt-calculator.html into one provable kernel. SBIE payroll/asset rates and the 15% minimum rate are OECD-published transitional table values pinned behind a constants_version field -- a rate change is a version bump, never a silent recompute. Jurisdiction-level QDMTT enactment/rate and the Central Record listing are caller-supplied, never vendored. KNOWN-WRONG (comment only, not behaviour, recorded 2026-08-17 per ART9-CITATION-FIX-1): the kernel source at chaingraph/kernels/art-365-compute-globe-topup-tax.kernel.mjs line 49 cites the SBIE transitional rates as 'Art. 9.1' -- the correct citation is Art. 9.2 (Art. 9.1 is Tax Attributes Upon Transition; Art. 9.2 is the Transitional relief for the Substance-based Income Exclusion, per research/ART9-NUMBERING-CONFIRM-1.md and research/ART9-NUMBERING-DENY-1.md). This node is sealed (compute_proof_ready: ready) so the kernel comment is left uncorrected per SO #36 -- no GPU re-prove for a comment. The kernel's behaviour is correct and cleared ART-365-SIDEBYSIDE-1 with zero divergences; fix the comment only if art-365 is ever legitimately re-proved for another reason.",
  "declared_inputs": [],
  "declared_outputs": [],
  "kernel_digest": "sha256:13a6650112aa3c9d98d82f8b01e865c13a0a80fedbda70988c9d012207a66e89",
  "trust_label": "independently verified: zkVM execution proof (risc0/groth16-bn254)",
  "data_vintage": "2026-07-10",
  "last_validated": "2026-07-10",
  "conformance_fixtures_vendored": true,
  "compute_proof_ready": "ready",
  "wave": 63,
  "source_url": "https://ainumbers.co/chaingraph/art-365-compute-globe-topup-tax.html",
  "generated_at": "2026-08-17T22:17:52.579Z"
}