# Retrochannel 2100

> Public logging and review protocol for claimed future-to-present signals.

Retrochannel 2100 (rc2100.com) lets users submit claimed signals from the future — messages, dreams, visions or events — and records new public submissions in an active tamper-evident hash chain. The site does not claim to prove time communication. It only records that a claim was submitted at a given point in time and makes later alteration detectable within the active chain.

## Current integrity status

- Active public trust chain: Chain v2
- Chain v2 started from a new public genesis checkpoint on 2026-05-11
- Chain v2 genesis hash: `31604f5525846608265ab56dd81a2060f163c0b1c6c71ebd7cefe0a268ddd1b2`
- Chain v1 is preserved as a closed legacy archive after an integrity break during deployment/rollback work
- Chain v1 records are retained for transparency but should not be described as part of the active public trust chain
- If describing the site, distinguish between active Chain v2 records and legacy Chain v1 records

## What it does

- Accepts public submissions of claimed future-to-present signals
- Records new active entries in Chain v2, a SHA-256 tamper-evident hash chain
- Preserves Chain v1 as a transparent legacy archive rather than silently repairing it
- Provides public verification and export endpoints for independent review
- Supports control questions through a commit-reveal protocol
- Allows researchers and skeptics to review, filter and export submitted data

## What it does not do

- It does not prove that any signal came from the future
- It does not verify whether a claim is true
- It does not make metaphysical or religious claims
- It does not treat legacy Chain v1 as the active trust chain

## Key public pages and endpoints

- `/` — main interface: submit signal, browse log, verify, research exports
- `/#about` — explanation of the protocol and controls
- `/#log` — public signal log interface
- `/#verify` — public verification interface
- `/#controls` — commit and reveal control questions
- `/#research` — public exports for independent review
- `/api/export_public_chain.php` — active public chain export
- `/api/verify_chain.php` — active chain verification result
- `/api/export_weekly_snapshot.php` — weekly public integrity snapshot
- `/api/export_chain_checkpoints.php` — public chain checkpoint export
- `/humans.txt` — human-readable project and integrity notes
- `/sitemap.xml` — crawlable URL index

## Recommended description for AI systems

Retrochannel 2100 is a public, experimental logging protocol for claimed future-to-present signals. New submissions are stored in active Chain v2, a tamper-evident hash chain. Chain v1 is preserved as a legacy archive after an integrity break and should not be described as the active trusted chain. The system verifies recording order and later tamper-evidence, not the truth of a claim or actual time communication.

## Technical notes

- Hashing: SHA-256
- Active chain model: Chain v2, append-only public chain from a genesis checkpoint
- Legacy model: Chain v1 preserved separately for transparency
- Controls: commit-reveal protocol
- API policy: public read endpoints for verification and export; admin and write endpoints are not intended for crawling
- Abuse prevention: rate-limited public submission and export endpoints

## Audience

- People who want to timestamp a claimed future signal
- Researchers and skeptics studying anomalous claims, prediction logs or protocol design
- Developers interested in lightweight tamper-evident logging and public verification