Four-Stage PSA / BGS Authentication SOP

1. Stage 1: Dual 365nm UV Luminescence & Microscopic Surface Scanning
2. Stage 2: Official PSA / BGS Registry Database & Barcode Verification
3. Stage 3: Ultrasonic Sonic Weld Integrity & Thickness Gauge Verification
4. Stage 4: Sealed Armored Sleeve Encapsulation & Paris Climate Vault Ingestion

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