SynthID is a Telegram bot that detects AI watermarks and provenance signals in photos, videos, audio, and voice messages. It supports Resemble/SynthID, OpenAI, ElevenLabs results, and local AIGC and C2PA metadata. The bot offers limited free daily checks, with additional checks and detailed reports accessible via Telegram Stars. The interface is in English. Negative watermark results do not confirm authenticity, and local metadata is not verified.