Public figures delete tweets. We make sure that deletion is never the last word.
Signal Archive continuously monitors the public statements of politicians, government officials, and figures of public interest. Every tweet we capture is cryptographically hashed and that hash is anchored to the Hedera Consensus Service, a public, immutable ledger operated by a global network of independent nodes.
When a tweet is deleted, we detect it, record it, and file a second attestation. The result is a tamper-proof timeline: what was said, when it was said, and when it disappeared.
1. Continuous monitoring
We poll tracked accounts at regular intervals: every hour for high-priority accounts, every four hours for others. Each poll captures the full tweet text and metadata at time of capture.
2. Cryptographic hashing
Each captured tweet is serialized into a canonical JSON format (deterministic key ordering, fixed fields) and hashed with SHA-256. This hash is a fingerprint: any change to the tweet content produces a completely different hash.
3. Hedera attestation
The hash, along with the tweet ID, author ID, and timestamps, is submitted as a message to a Hedera Consensus Service topic. Hedera assigns a consensus timestamp and sequence number. This record is permanent and cannot be altered or deleted by anyone, including us.
4. Deletion detection
We continuously check whether archived tweets still exist. When a tweet returns a 404, we flag it as deleted, record the deletion event, and submit a second HCS message referencing the original attestation.
You don't have to trust us. Every attestation is independently verifiable:
Hedera Consensus Service was chosen because it answers the hardest question about an archive like this: what stops you from altering or suppressing the records?
The answer: nothing we do after submission matters. HCS is a public, append-only ledger with no delete operation. Once a message is submitted, it is permanently visible to anyone on the public network, including the sequence number, timestamp, and content. Even if Signal Archive were shut down tomorrow, every attestation would remain readable on Hedera indefinitely. We cannot alter, retract, or suppress them.
Phase 1 tracks approximately 40 accounts: Trump family members, affiliated crypto project accounts (World Liberty Financial, $TRUMP, $MELANIA), key political appointees, and select federal officials. Retweets are excluded; we track what people say, not what they amplify.
Why these accounts? Phase 1 is deliberately focused on the executive branch and crypto-adjacent public officials because that intersection (government power plus financial self-interest in digital assets) is where public accountability is most urgent and deletion patterns are most documented. This is a starting scope, not a complete picture. Phase 2 will expand to all 535 members of Congress. Accounts are added based on public interest, documented deletion history, and relevance to active legal or political accountability questions, not based on party.
Deletion severity. Each detected deletion receives a severity score (1–10) generated by Claude AI (Anthropic). The score reflects estimated public interest significance based on content, tweet age, and the account's role. Scores are indicative, not definitive. They help surface potentially newsworthy deletions but carry the limitations of any automated classification. Low-confidence scores are not suppressed; treat them as a starting signal, not a verdict.
All source code and scoring logic is available for review. The HCS topic is fully public; anyone can audit the complete record of submissions independently.
No archive is perfect. Here is what Signal Archive does and does not capture:
All attestations are submitted to a single public HCS topic on Hedera Mainnet. Anyone can read the full message history independently, no account or login required.
Signal Archive publishes its authoritative Hedera topics through a public HCS-2 topic registry so third parties can independently discover the archive structure without relying on this website.
Signal Archive is independently built and funded. If you find it useful, you can support it directly with HBAR or USDC via your Hedera wallet. Donations go toward Hedera network fees, infrastructure, and ongoing development.
Donate to Signal ArchiveSignal Archive monitors publicly visible statements made by public figures in their public capacity. All archived content was publicly accessible at time of capture. This project operates in the public interest under established principles of press freedom and public records accountability.