# Reading your certificate like a pro

> Three lines of code turn out to be plain sentences. Learn them once, and no coin can ever lie to you again.

*Chapter 08 · 5 min · Curious collectors*

## 1. The on-chain block on every coin page

Scroll down any coin page on Bifrost and you will find a small technical panel: a contract address, a token id, and a list of transaction hashes. Most people's eyes slide straight off it. Yours are about to stop doing that — because those three lines are the certificate, and everything else on the page is a friendly retelling of what they say. Five minutes here and you will be able to check any coin's story yourself, without taking anyone's word for it. Including ours.

## 2. The contract address: the series' home

The contract address — a long code starting 0x — is the series' permanent home on Base. Think of it as the registry office where one particular series keeps its books: every coin in the series is recorded inside this one contract, along with the rules it lives by, including the creator royalty. The address never changes for the life of the series. If two coins claim the same series but show different contract addresses, at least one of them is lying.

## 3. The token id: your coin's line in the book

Inside the contract, every physical coin has one number: its token id. On Bifrost it matches the edition number of the physical piece — edition 17 of 200 is token 17 in the series' contract. That pairing is the whole trick that connects a physical object to a digital record: one coin, one number, one entry. When your certificate says you own token 17, the contract's public ledger says so too — to anyone who asks it, in any country, at any hour.

## 4. Transaction hashes: the receipts

Every event in your coin's life — its minting, each sale, each change of custody — happened in a transaction, and every transaction has a hash: a unique fingerprint starting 0x. The hashes on your coin page are links into the public record of Base itself. Follow one and you see the raw event: when it happened, between which wallets, for how much, and how the money divided between seller, platform and creator. It is a receipt that nobody issued and nobody can retract.

## 5. Why this makes provenance portable

Here is what those three lines add up to: your coin's history does not live in Bifrost's filing cabinet. It lives on a public ledger maintained by thousands of computers, readable by anyone with a browser, forever. If you sell privately in thirty years, your buyer can verify every owner and every price without trusting you, us, or whether Bifrost still exists. Paper certificates ask to be believed; this record proves itself to everyone. That is the entire reason the market was built this way.

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Read it on Bifrost — https://bifrostvault.io/learn/wallet-basics