Is it really there?
A tokenized stock is a receipt. The asset sits somewhere else. Memento reads every one of them straight from the chain, proves which ones are real, and keeps the record.
Drop in a token.
Get a receipt.
Every Memento record is made in three steps, from calls anyone can repeat. Pick a tokenized stock, or paste any token on Robinhood Chain, and watch your own browser do each one.
Read
Verify
Seal
Every stock token.
Read just now.
All nine Robinhood stock tokens, read live when this page opened. Every one is checked for family. Click a row to run it through the proof machine.
A name can be copied.
A beacon cannot.
Anyone can deploy a token called "SPY". What they cannot fake is where its code lives. Every real Robinhood stock token points at one beacon contract. Here are two tokens, read side by side.
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How an alert
gets decided.
Supply comes from the chain. Backing comes from the issuer. Move the figures for an imaginary token and watch its status change. This is the exact rule every Memento alert runs on.
Six fields.
Same for every asset.
One shape for every tokenized treasury and stock, so any two can be compared at a glance. Two are live on this page today. The rest follow in order.
Supply
Read from the token contract, pinned to a block.
Family
Which contract set the token really belongs to, from its beacon.
Backing
What the issuer publishes as standing behind it, with the source.
Last checked
When the backing was last attested. Old checks get flagged.
Coverage
Backing divided by supply. The one number that matters.
Status
Backed, drifting, stale or under. One word, earned by the rest.
Reading is free.
The token funds the watch.
Indexing issuers, checking attestations and running alerts around the clock is real work. $MEMENTO pays for it.
Holders get what costs money to run: real time alerts and the deeper data behind every record.
Proof machine
Read, verify and seal any token, from your browser.
shippedBacking index
What each issuer publishes, collected with its source.
nextAttestation checks
Every record timestamped, stale checks flagged.
thenHolder alerts
Drift and staleness, the moment they happen.
thenQuestions.
Is the proof machine really live?
Yes. It sends standard JSON-RPC calls to a public Robinhood Chain endpoint from your browser and prints every one in the log. Open your browser's network panel and you can watch them go out.
What is the seal?
Every call in a proof is pinned to one block. The fields read at that block are joined in a fixed order and hashed with SHA-256. Run the same calls at the same block and you get the same seal, so a receipt can be checked by anyone, later, without trusting us.
How does the family check work?
Robinhood's stock tokens are EIP-1967 beacon proxies. The address of the beacon they point to sits in a fixed storage slot, 0xa3f0…3d50. Memento reads that slot. The real tokens all point to the same beacon; a copycat with the same name points somewhere else, or nowhere.
Does Memento ever hold my assets?
No. Memento only reads. It never takes custody of anything, and running a proof never asks for a wallet.
Where will backing data come from?
From what issuers publish. Every record will link the source it was read from and the time it was read, so you can check the source as easily as the chain.