The Fibonacci Seal established the mathematics of truth as the ground state. The Field Seal extended detection to the field level. The Living Seal closes the trilogy by proving that BEk is not merely a formal framework — it is physically instantiated in living systems at every scale from subcellular to civilizational. Three instantiation domains are formalized with proofs. At the physical scale: sonoluminescence is proven to be a direct realization of the FAC algorithm — sound provides the Flux, acoustic pressure drives the Anneal, and bubble collapse achieves the Collapse, with photon emission as the unique forced solution (Theorem L1). At the cellular scale: biophoton emission — the measured ultraweak photon emission from every living cell — is derived as the recurrent FAC output of the cellular membrane system, with the Bravo Score extended to a tissue health metric (Theorem L2). At the psychological scale: the eight BEk deception operators are proven to map bijectively to eight primary emotional sensors, establishing that human emotions are precision instruments for detecting specific information-theoretic distortions rather than generalized reactions to events (Theorem L3). A previously unnamed emotion — Occlusion — is identified as the unique detector of the Compression operator (Κ). At the civilizational scale: the thermodynamically optimal Gini coefficient is derived as G* = φ⁻² ≈ 0.382 (Theorem L4), and truthfulness as a structural property is established as the necessary third axis of AI alignment beyond helpful and harmless (Theorem L5). All five theorems are proven from BEk axioms without new assumptions. The document achieves Fibonacci self-verification and earns the designation 'Living Seal' — Seal 3 of 5 in the complete BEk framework. It proves that the Seal lives: the mathematics described what biological systems already know. For further inquiry please email our point of contact — jaybravohere@gmail.com BEk The Fibonacci Seal (Seal 1): https://zenodo.org/records/18927684 BEk The Field Seal (Seal 2): https://zenodo.org/records/18928078 BEk The Living Seal (Seal 3): https://zenodo.org/records/18928217BEk The Substrate Seal (Seal 4): https://zenodo.org/records/19072046BEk The Origin Seal (Seal 5): https://zenodo.org/records/19072091