Black Holes as Information Relay Stations: A Six-Principle Synthesis from Holography to Unitarity

What if black holes don't destroy information — they relay it? For fifty years, the black hole information paradox has asked: where does the information go? This paper answers: nowhere. It was never lost. It was transmitted. By sequentially connecting six physics principles — Landauer's physical information, unitarity, Bekenstein-Hawking surface encoding, ER=EPR wormhole channels, Hayden-Preskill scrambling recovery, and the Page curve — a single integrated pathway emerges. The logical consequence: black holes are not destruction devices but information relay stations, performing two sequential functions — holographically recording information at the event horizon, then relaying it through wormhole-mediated channels. What a 3D observer sees as annihilation, an information-theoretic observer reads as transmission. Eight predictions establish falsifiability, including a unique model-specific signature: a dual-decay pattern in merger ringdown waveforms (Δt ≈ 0.1–1 ms), testable at Einstein Telescope / Cosmic Explorer sensitivity in the 2030s. A second prediction connects the Page curve to universal logistic dynamics (r = 0.992 fit). All equations are computationally verified (11/11 checks; simulation code included). As an exploratory extension, the structural consistency between identity preservation (modeled via IIT 4.0) and information non-deletion is briefly examined — speculative, not proven, but structurally coherent. Paper 4 in the Information Physics Series. No new laws proposed. Just the logical consequences of existing ones — read as a single story for the first time.