Who can verify liens on a property?

I am planning to attend an auction and would like to hire someone or use a service online to check liens, especially theone that are not cleared after an auction such as listed below. Would you recommend anyone for this service? or an online service?

:Chapter 7, Section 3712 of the California Revenue and Taxation Code states: The deed conveys title to the purchaser free of all encumbrances of any kind existing before the sale, except:

(a) Any lien for installments of taxes and special assessments, which installments will become payable upon the secured roll after the time of the sale.
(b) The lien for taxes or assessments or other rights of any taxing agency which does not consent to the sale under this chapter.
(c) Liens for special assessments levied upon the property conveyed which were, at the time of the sale under this chapter, not included in the amount necessary to redeem the tax-defaulted property, and, where a taxing agency which collects its own taxes has consented to the sale under this chapter, not included in the amount required to redeem from sale to the taxing agency.
(d) Easements constituting servitudes upon or burdens to the property; water rights, the record title to which it is held separately from the title to the property; and restrictions of record.
(e) Unaccepted, recorded, irrevocable offers of dedication of the property to the public or a public entity for a public purpose, and recorded options of any taxing agency to purchase the property or any interest therein for a public purpose.
(f) Unpaid assessments under the Improvement Bond Act of 1915 (Division 10 (commencing with Section 8500) of the Streets and Highways Code) which are not satisfied as a result of the sale proceeds being applied pursuant to Chapter 1.3 (commencing with Section 4671) of Part 8.
(g) Any federal Internal Revenue Service liens which, pursuant to provisions of federal law, are not discharged by the sale, even though the tax collector has provided proper notice to the Internal Revenue Service before that date. (A title search initiated at the prospective purchaser’s expense should reveal any liens or encumbrances on a property in the tax sale.)
(h) Unpaid special taxes under the Mello-Roos Community Facilities Act of 1982 (Chapter 2.5 (commencing with Section 53311) of Part 1 of Division 2 of Title 5 of the Government Code) that are not satisfied as a result of the sale proceeds being applied pursuant to Chapter 1.3 (commencing with Section 4671) of Part 8."

Title Company.

If you have a good relationship with a Title company, ask for a Letter Report (free if you are a customer): it will list all liens and judgments in an easy summary format.