Blurry to 4K AI Upscale

Enhance the portrait while preserving the subject’s exact identity. Maintain accurate facial structure, proportions, and natural features. Do not alter face shape, expression, or identity. Only apply subtle cleanup to improve clarity while keeping the person fully recognizable. Keep the original background exactly as it is. Do not replace, modify, or add anything. The environment, framing, and composition must remain unchanged. Recreate the image with a premium full-frame camera look, similar to a Sony A1 with an 85mm f/1.4 lens. Use shallow depth of field with sharp focus on the face and smooth natural background blur. Maintain realistic lens behavior and natural perspective. Match the original lighting direction and mood, then refine it into a cinematic, subject-focused look. Use soft directional light with gentle contrast, controlled highlights, and clean shadows. Avoid harsh lighting or artificial glow. Maintain natural skin texture with fine detail. Avoid over-smoothing or plastic appearance. Use balanced color tones with a subtle cinematic contrast and realistic saturation. Output should feel like a high-end editorial portrait with improved clarity, depth, and tonal range, while keeping the original scene and identity fully intact. Negative constraints: Do not change background. Do not alter face or expression. No artificial glow or over-processing. No unrealistic lighting. No skin smoothing or texture loss. Insert discreet watermark in the lower right corner of the image, vertical text (rotated 90°), written "aipromptlabs.online", Calibri Light font, white color with low opacity (semi-transparent), medium size. Extreme sharpness on the face, fabric texture and typography of the letters. Shot on Canon EOS R5, 50mm f/2.8, studio light.