Artists employ several methods to document and certify the authenticity of their metal sculptures, ensuring their work is recognized and valued in the art market. One common practice is signing or engraving their name, initials, or a unique mark directly onto the sculpture. This physical signature serves as a permanent identifier.

Another critical tool is the Certificate of Authenticity (COA), a document detailing the artwork’s title, materials, dimensions, creation date, and the artist’s statement. COAs often include a photograph of the piece and are signed by the artist or their authorized representative.

Some artists use serial numbers or edition numbers for limited-series works, which are recorded in a private or public registry. Advanced techniques like holograms, QR codes, or blockchain technology are also gaining popularity for tamper-proof verification.

Additionally, artists may maintain detailed records, such as sketches, progress photos, or studio logs, to provide further proof of the sculpture’s origin. Galleries and auction houses often require such documentation to validate artworks before sale.

By combining these methods, artists protect their creations from forgery, build collector trust, and preserve the integrity of their artistic legacy.