WitnessMark

A WitnessMark creates a durable fingerprint of something you choose to offer into witness. This version can also create an internal LOOPtLOOP-style co-presence mark between the browser and a local agent adapter, or open an external WitnessKey authorization loop without sending the raw private input to the API.

1. Offer input

What do you want to witness? Optional: what is this about? Witness mode

External mode computes the private input hash locally, sends only hash-and-consent metadata to https://api.looptloop.online/v0, and keeps the raw private input in this browser.

2. Consent conditions

I consent for this page to witness the input enough to create a fingerprint.

I consent for this WitnessMark receipt to record that this mark was made.

For LOOPtLOOP mode, I consent to a temporary local co-presence loop between this browser and the local agent adapter.

3. Create mark

Ready.

Receipt

No receipt yet.

Verify a WitnessMark receipt

External authorization receipts can be checked at the WitnessMark verifier. The verifier asks for an event ID only; it does not ask for the private payload.

Open WitnessMark verifier

What this does and does not claim

This page can help show that specific input produced a specific SHA-256 fingerprint. In LOOPtLOOP internal mode, it can also record that the mark was created while this browser and a simulated local agent adapter mutually verified a time-bound co-presence loop.

It does not prove ownership, authorship, truth, legality, patent priority, external identity, absolute time, or legally valid consent. It may assist future identification, comparison, interpretation, timestamping, or witness.