Why Uncrossable Exists

Real-time chunked upload. When you record, your browser captures video and audio using the MediaRecorder API. Every 5 seconds, the accumulated data is packaged into a chunk and uploaded to our servers. Each chunk is an independent file — even if the next one never arrives, the previous ones are safe.

Cryptographic hashing. The moment a chunk arrives on our server, we compute its SHA-256 hash and store it. This hash acts as a mathematical fingerprint — if even a single bit of the video were changed, the hash would be completely different. When the recording ends, we compute a final integrity hash over all chunk hashes, creating a chain of proof.

Immutable by design. There is no delete endpoint in our API. There is no admin panel with a delete button. There is no database flag to mark a recording as hidden. This isn't a policy — it's an architectural decision. The code literally cannot delete recordings.

Privacy via secret tokens. Each recording gets a unique access token — a long random string that serves as the only key. We don't require accounts, emails, or phone numbers. The recording URL is the access control. Only people you share the link with can view it.

No accounts required. We never ask for your name, email, or phone number to create a recording. Accounts are optional for linking recordings to a profile.

IP addresses are hashed. We store a one-way hash of your IP for rate limiting only. We cannot reverse it to identify you.

Recordings are access-controlled. Only the secret token URL provides access. We do not index recordings, share them with third parties, or make them publicly discoverable unless the owner explicitly marks them public.

Recordings are permanent. Once created, a recording cannot be deleted by anyone — including us. This is intentional. The purpose of this platform is to create indelible records. Consider this before recording.