Our Trusted Authentication Network

Icon Sport Investments was founded in 2016 with a singular mission: to bring transparency and trust to the sports memorabilia market. Based in the United States, ISI has grown into a full-service authentication and certification company serving collectors, dealers, and investors across the country. Our team of experienced authenticators evaluates signatures, game-used equipment, trading cards, and collectibles using industry-leading techniques including forensic analysis, provenance research, and comparative signature databases. Every item that passes our rigorous review receives a tamper-evident hologram and a certificate of authenticity backed by our guarantee.

Authentic History LLC has been a trusted name in sports and historical memorabilia authentication since 2014. Specializing in vintage and rare collectibles, Authentic History brings deep expertise in provenance verification and historical documentation. Their team works closely with estates, auction houses, and private collectors to ensure that pieces of sporting history are properly identified, authenticated, and preserved for future generations. With a certificate prefix of AHL-, every item authenticated by Authentic History LLC carries the weight of years of research and expertise.

Vanys Collectibles Inc has built a strong reputation in the collectibles authentication space since 2015. Known for their meticulous attention to detail and collector-first approach, VCI specializes in sports memorabilia across all major professional leagues. Their authentication process combines physical examination with digital record-keeping, giving collectors a permanent, verifiable record of their item's authenticity. Vanys Collectibles serves individual collectors, sports retailers, and memorabilia dealers who demand accuracy and accountability in every certificate issued.

Sports Ink Inc was established in 2017 with a focus on autograph authentication and signature verification. The company's name reflects its core expertise — the ink on a signed piece of memorabilia tells a story, and Sports Ink's authenticators are trained to read that story with precision. Using comparative signature analysis, ink aging assessment, and signing event documentation, Sports Ink provides collectors with confidence that every autograph they certify is genuine. Their SIK- certificates are recognized by collectors and dealers throughout the industry.

Supreme Authentications was founded in 2018 to serve the growing demand for reliable, professional-grade sports memorabilia certification. The company has quickly established itself as a go-to authentication service for collectors who want more than just a sticker — they want a thorough, documented review backed by experienced professionals. Supreme Authentications issues SAI- certificates that include detailed item descriptions, authenticator notes, and a secure digital verification record accessible at iconsportinvestments.com.

Titleist Investments Group brings a championship mindset to sports memorabilia authentication. Founded in 2016, TIG serves collectors and investors who view authenticated sports memorabilia as both a passion and an asset. Their team understands the investment value of properly authenticated pieces and provides thorough documentation that supports long-term value retention. TIG- certificates are issued only after a comprehensive review process, ensuring that every item in a collector's portfolio is backed by credible, professional authentication.

The Sports Palace has been a cornerstone of the sports collectibles community since 2015. More than just an authentication service, The Sports Palace is a destination for collectors who appreciate the history and culture of sports memorabilia. Their authenticators bring passion and expertise to every item they review, from rookie cards to championship rings. TSP- certificates carry the prestige of a brand that has earned the trust of collectors across the country through consistent, professional authentication.

Gameday Auctions is the premier destination for authenticated sports memorabilia auctions. Specializing in sports cards, jerseys, autographs, and collectibles, Gameday Auctions connects passionate collectors with verified, authenticated pieces from across the world of sports. Every item offered through Gameday Auctions carries a certificate of authenticity verified through the Icon Sport Investments network, giving bidders complete confidence in every lot. GDA- certificates represent the highest standard of auction-grade authentication.