{"projection_revision":6,"snapshot":"40281fb74597c3d5392a1904486fd75b","catalog_version":33437,"snapshot_created_at":"2026-10-21T21:17:10+00:00","snapshot_expires_at":"2026-10-22T21:17:10+00:00","source_changed_at":"2026-10-21T21:15:01+00:00","freshness_behavior":"materialized on first request after a committed source change; database triggers cover row writes and relationship writes","source_id_sha256":"a2bc4068f157b8e6d6075dbd6398f596ccf21fb02dc60e67b5f2ebf1469f85e7","source_content_sha256":"2742c65f17ea5928d067991af90718fac7aac0e3ca643c4652c267167bc8512f","total_catalog_pieces":8271,"canonical_url":"https://roadtovirtuosity.com/ai/catalog/pieces/4918?piece_id=4918","schema_version":"2.0","query":"","normalized_query":"","resolved_filters":{"piece_id":4918,"timezone":"UTC"},"sort":"relevance","projection":"full","total_matches":1,"returned":1,"page":1,"per_page":50,"total_pages":1,"previous_page_url":null,"next_page_url":null,"end_of_results":true,"alternate_formats":{"html":"https://roadtovirtuosity.com/ai/catalog/pieces/4918?page=1&piece_id=4918&projection=full&snapshot=40281fb74597c3d5392a1904486fd75b","json":"https://roadtovirtuosity.com/ai/catalog/pieces/4918.json?page=1&piece_id=4918&projection=full&snapshot=40281fb74597c3d5392a1904486fd75b","text":"https://roadtovirtuosity.com/ai/catalog/pieces/4918.txt?page=1&piece_id=4918&projection=full&snapshot=40281fb74597c3d5392a1904486fd75b"},"warnings":["Archive-only entries have unknown grading status. Zero points with Level 0 are pending. Positive points establish known grading, including beginner Level 0; explicit review declarations are preserved.","Strict taxonomy filters exclude unattributed records; search title text separately before deciding something is missing.","Work identity, musical sequence and completeness are unknown unless reviewed metadata is supplied. Catalog collections are existing subcategory groupings.","Historical first-publication dates are unknown. Date counts include only currently public entries with known first-publication dates.","File availability reports a public file reference, not a storage-health check."],"publication_count_scope":"currently public entries first published during the requested interval","unknown_publication_dates_before_date_filter":0,"distinct_work_count":null,"approximate_suggestions":[],"message":null,"pieces":[{"piece_id":4918,"title":"Czerny - 50 Grand Finishing Studies - Op. 409, No. 49","composer":["Czerny, Carl"],"composers":[{"id":2,"name":"Czerny, Carl"}],"instrument":["Piano"],"instruments":[{"id":1,"name":"Piano"}],"genre":"Romantic","genre_id":3,"is_archive_only":false,"evaluation_eligible":true,"grading_status":"graded","grading_status_label":"Graded","points":54488,"level":7,"canonical_url":"https://roadtovirtuosity.com/czerny-50-grand-finishing-studies-op-409-no-49","instrument_points":[{"instrument_id":1,"instrument":"Piano","points":54488}],"collections":[],"collection_semantics":"existing catalog subcategory grouping","work_identifiers":[],"work_id":null,"book":null,"sequence_position":null,"movement_number":null,"movement_title":null,"key":null,"arrangement":null,"edition":null,"entry_scope":null,"completeness":"unknown","reviewed_enrichment":false,"availability_label":"Public Domain","has_download":true,"download_availability_basis":"public license category and existing file reference; storage health not verified","description":"Soft upper tones rest over an even stream of lower broken chords. The bass rises and falls in broad waves beneath shorter melodic accents.","created_at":"2026-09-15T12:00:02+00:00","first_published_at":"2026-09-15T12:00:02+00:00","published_at":"2026-09-15T12:00:02+00:00","updated_at":"2026-09-15T12:00:08+00:00","match_basis":"filters"}],"latest_catalog_version":33437,"source_lag_revisions":0}