There is no verified Blur CSV or tax-report download documented in the available material. The dependable way to assemble your history is to combine Blur’s visible Portfolio and Activity views with the wallet records and the blockchain explorer for every chain you used. Save transaction hashes, classify each event, capture fees and acquisition evidence, and reconcile the result before giving it to tax software or a preparer.
This guide uses U.S. federal recordkeeping as an example. Tax treatment depends on your facts and jurisdiction; recordkeeping guidance is not individualized tax advice.
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What “export your Blur history” means in practice
Blur’s current interface visibly includes Portfolio and Activity navigation. The available documentation does not establish a native CSV, spreadsheet, or tax-report export, so do not assume that a button, file format, or menu path exists. Check the live interface for changes, but build your records so they remain complete even if the marketplace view changes.
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Gather every wallet and blockchain first
Start with an address inventory. List every wallet that may have bought, sold, received, transferred, or funded an NFT trade through Blur. Include addresses you no longer use and record which address belongs to you. A wallet label such as “hardware wallet,” “trading wallet,” or “custody transfer” makes later reconciliation much easier.
Next, identify the chain for each address and transaction. An Ethereum address can also have activity on other networks, but an explorer is chain-specific: an Ethereum explorer will not show the same address’s Base or Polygon activity. Keep a separate chain column in your ledger and use the explorer associated with that chain.
- Wallet address, ownership and your internal label
- Blockchain used for the event
- Date range covered
- Any marketplace, wallet, or tax-software account identifiers that help you match records
Compare the three record sources
| Source | What it can show | Fees and internal transactions | Export and retention | Basis coverage |
|---|---|---|---|---|
| Blur Portfolio and Activity | Marketplace activity visible for the connected wallet; exact scope depends on the current interface. | Not stated in the available Blur interface documentation. | A downloadable export is unverified; retain your own copy of the information you can see. | Not stated; do not treat the marketplace view as a complete acquisition ledger. |
| Wallet activity | Events presented by the wallet for that address and its supported networks. | Wallet software may omit internal transactions or present them in a simplified form. | Export or download options vary by wallet and are not established here. | Usually requires separate acquisition and cost records; a wallet view alone is not proof of basis. |
| Blockchain explorer | On-chain transactions and token-transfer details for one specific chain. | For Ethereum, the Internal Txns view can reveal additional payments such as marketplace fees and creator earnings. | Save transaction hashes and durable copies of relevant pages or downloaded data where available; explorer export formats vary. | Explorers show on-chain facts, not your complete tax basis history. |
Use all three where they overlap. Blur helps identify the marketplace event, the wallet helps tie it to your address, and the explorer supplies the authoritative on-chain transaction record. None should be assumed complete by itself.
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Step-by-step workflow
1. Create a working ledger before opening transactions
Use a spreadsheet or database with one row per economically meaningful event. Add columns for wallet, chain, transaction hash, timestamp, event type, collection, token ID, units, value, fees, and evidence links or filenames. Keep a separate notes column for uncertain classifications rather than silently deleting or guessing.
2. Review Blur’s Portfolio and Activity views
Connect or select the relevant wallet in Blur and review both Portfolio and Activity. Use any date, collection, or event filters that the current interface provides. Capture the visible date, collection, token identifier, quantity, and displayed amounts. Record the transaction hash whenever Blur shows one.
Save a PDF printout or screenshot only as supporting evidence; it is not a substitute for the on-chain record. Because a native export is not verified, do not rely on a page remaining available after you file your return.
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3. Open the wallet on the correct chain explorer
For every wallet-and-chain combination, open the address in that chain’s explorer. Examples include Etherscan for Ethereum, BaseScan for Base, and Polygonscan for Polygon. Use the explorer that matches the actual transaction; sending every Blur transaction to Etherscan will miss activity performed on another network.
- Search the exact wallet address.
- Set the relevant date range if the explorer offers that control.
- Review normal transactions, token transfers, NFT transfers, and contract interactions.
- Open each candidate transaction and copy the full hash, block timestamp, status, from and to addresses, asset movements, and displayed value.
- Match the hash to the corresponding Blur or wallet entry. If there is no match, mark the row for investigation rather than treating it as unrelated.
4. Inspect Ethereum Internal Txns when the sale is on Ethereum
For Ethereum sales, open the transaction’s Internal Txns section when available. Marketplace fees, creator earnings, and other contract-mediated payments may appear there even when the wallet application shows only the headline NFT transfer. This is a general explorer technique, not proof of a Blur-specific export.
Record who received each payment and how it relates to the transaction. Do not add every internal movement as a separate sale; use the transaction structure to distinguish proceeds, fees, royalties, refunds, and unrelated contract activity.
5. Classify each event
Assign a consistent event type to every row:
- Purchase: you acquired an NFT or another digital asset.
- Sale or other disposition: you transferred an asset in exchange for value.
- Swap or exchange: one asset was exchanged for another.
- Transfer: movement between wallets you control or a transfer with no sale proceeds.
- Receipt: an asset entered the wallet, potentially as a gift, reward, payment, or other income event.
- Fee: gas, marketplace commission, royalty, transfer tax, or another cost tied to the transaction.
Keep the underlying hash on every related row. A single contract transaction may contain several token transfers and payments, so the hash is the link between the ledger entries.
6. Capture the fields needed to explain value and basis
| Field | What to record | Why it matters |
|---|---|---|
| Wallet and chain | Address, your label, and blockchain | Separates accounts and prevents one explorer from being mistaken for a complete history. |
| Transaction identity | Full hash, block or explorer URL saved in your notes, and status | Lets you retrieve the original on-chain evidence. |
| Date and time | Timestamp as displayed by the explorer, with the time zone noted | Establishes when the event occurred. |
| Asset details | Collection or contract, token ID where applicable, and number of units | Identifies exactly what was acquired or disposed of. |
| Value | Currency and amount transferred, plus U.S.-dollar fair market value when required for your reporting | Supports proceeds, income, and gain or loss calculations. |
| Costs | Gas, marketplace fee, royalty, transfer tax, commission, and any other transaction cost | Costs can affect the amount reported and must be traceable to the event. |
| Basis evidence | Original purchase record, receipt, exchange record, or other documentation showing acquisition cost | On-chain ownership does not by itself establish your tax basis. |
| Supporting files | Blur or wallet capture, explorer page, receipt, and explanatory notes | Preserves context if a transaction is difficult to interpret later. |
7. Reconcile purchases, sales, transfers, and fees
Compare the marketplace list with the explorer rows and your own acquisition records. For each sale, locate the NFT’s acquisition event and document how you determined basis. For each purchase, verify that the outgoing payment and NFT receipt belong to the same transaction or explain why they do not. For wallet-to-wallet transfers that you control, document both sides so the movement is not mistaken for a sale.
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Investigate mismatches such as a missing token transfer, an unexpected currency payment, a duplicated marketplace row, a failed transaction that still consumed gas, or an internal payment that the wallet did not display. Leave an audit note describing the resolution.
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8. Preserve a durable copy
Save the original spreadsheet, a read-only copy, and the supporting files in at least two secure locations. Keep the raw transaction hashes unchanged. If you export data from an explorer or wallet, retain the original file and note the date you obtained it. Protect private keys and seed phrases; tax records never require you to disclose them.
9. Treat tax-software imports as a draft
Some unaffiliated services can import wallet and marketplace activity and help estimate digital-asset taxes. OpenSea says it cannot guarantee third-party services, even where it identifies a partnership such as CoinTracker. An import is therefore a starting point, not a completed return.
After importing, compare the software’s rows with your explorer ledger. Check chain coverage, duplicate transactions, transfers between your own wallets, NFT cost basis, fiat conversions, gas treatment, and missing internal transactions. Correct the software or maintain an adjustment schedule that explains every difference.
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The Internal Revenue Service treats digital assets, including NFTs, as property for U.S. federal tax purposes. Its guidance says digital-asset transactions must be reported whether or not they produce a taxable gain or loss, and it states: “The Internal Revenue Code and regulations require taxpayers to maintain sufficient records to establish the positions taken on federal income tax returns.”
For a disposition, the IRS identifies the information needed to calculate gain or loss as the asset type, transaction date and time, number of units, fair market value at the time, and basis. Your ledger should therefore preserve both the sale-side evidence and the earlier acquisition records rather than recording only the net amount that reached your wallet.
The IRS also calls for U.S.-dollar fair market value for digital assets received as income or in the ordinary course of business. If you received an NFT or token rather than buying it, preserve the evidence used to determine its value and the reason for the receipt.
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Fees and transaction costs
IRS FAQ guidance lists transaction and gas fees, transfer taxes, and commissions as possible transaction costs. Keep the amount, currency, recipient, and transaction hash for each cost. Do not assume that the marketplace’s displayed proceeds already reflect every fee or that a wallet’s net balance is enough to prove the calculation.
Broker statements and reporting dates
For covered transactions effected on or after January 1, 2025, brokers must report gross proceeds. Basis reporting applies to certain transactions effected on or after January 1, 2026. The IRS also says that, for certain NFT and stablecoin sales, brokers may choose aggregate reporting when the applicable de minimis thresholds are exceeded.
These rules do not mean every Blur transaction will generate a Form 1099-DA, and a broker statement does not replace your own records. Reconcile any statement to your wallet and explorer ledger, and ask a qualified tax professional how the rules apply to your activity.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Common gaps and how to resolve them
The Blur page shows an activity item but no hash
Use the wallet and chain explorer to search around the displayed time, collection, and amount. Contract interactions can involve several transfers, so inspect token-transfer tabs and related addresses. If you still cannot identify the event, keep the Blur capture, mark the row unresolved, and do not invent a hash.
The wallet omits a fee or creator payment
Open the full explorer transaction. On Ethereum, inspect Internal Txns and token-transfer details. Reclassify the payment as a fee, royalty, proceeds component, or unrelated movement only after reviewing the recipient and contract context.
The same NFT appears in more than one wallet
Trace the token ID and hashes across both addresses. A transfer between wallets you control should have matching outbound and inbound records. Label it as an internal transfer and retain evidence of common ownership.
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You cannot find the original purchase
Search earlier dates and every wallet that may have held the asset. Check whether the NFT arrived through a swap, gift, reward, or transfer instead of a direct purchase. Preserve the evidence you do have and ask a tax professional how an unsubstantiated or inherited basis should be handled.
A transaction failed
Keep the failed hash and the gas receipt. A failed contract call may not have transferred an NFT, but it can still create a cost and should not be silently removed from the chronology.
What a finished record package should contain
- A wallet-and-chain inventory with ownership labels
- A reconciled ledger covering purchases, receipts, sales, swaps, transfers, and fees
- Transaction hashes for every on-chain event
- Collection, contract, token ID, units, timestamps, values, and costs
- Acquisition and basis documentation for disposed assets
- Explanatory notes for duplicates, missing data, internal transfers, and unresolved items
- Read-only backups of the ledger and supporting captures
- A list of any tax-software adjustments and the source evidence for each one
When a tax preparer asks for NFT sales records, provide this package rather than a marketplace screenshot alone. It shows how each reported figure was traced from the marketplace view to the wallet and then to the blockchain.
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Does Blur currently offer a CSV or tax-report export?
A native downloadable export is not verified by the available documentation. Check the current Blur interface, but plan to assemble records from Portfolio, Activity, your wallet, and the relevant chain explorer.
Which explorer should I use for a Blur transaction?
Use the explorer for the transaction’s blockchain: for example, Etherscan for Ethereum, BaseScan for Base, or Polygonscan for Polygon. One explorer cannot display activity from every chain.
Can I use only my wallet’s transaction list?
No. Wallet interfaces can omit internal transactions and may not preserve acquisition or basis information. Use the wallet as one reconciliation source alongside Blur and the chain explorer.
Will every Blur trade produce a Form 1099-DA?
Not necessarily. Broker reporting rules and any aggregate-reporting elections do not guarantee a statement for every marketplace transaction, so retain your own complete records.
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1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsDo I need a tax professional?
If you have missing basis, income receipts, cross-wallet transfers, multiple chains, or uncertain fee treatment, ask a qualified tax professional. The workflow here is recordkeeping information, not an individualized tax conclusion.
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