Concertino for piano and chamber orchestra: 1. Allegretto giocoso

Recording by Tzvetan Tzvetanov.

Recording identifiers

ISRC
BGA672264201
Release date of the album this recording appears on
1974-09-10
CopyrightID (CopyrightChains transaction hash)
0x70be53e250f122099c0f3ebeae8c1900a3da4b0bbd990437b5a4d5bcef837908
Copyright registration time
2026-07-07T10:24:22+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:20:19Z
Bitcoin block
957118
Canonical record hash
sha256:f109216d066cca1a7558ab0c2625423c85d4529659a25651fd632043994e6cdd

What this proof establishes

This recording was released in 1974, before generative AI. ProofProfile's catalogue derives from the pre-2022 AcousticBrainz and MusicBrainz source corpus, and ISRC is the stable recording-level bridge from that source corpus to the authoritative cc-db-prod track record.

CopyrightChains and Bitcoin OpenTimestamps make the exact committed record independently verifiable today. The cryptographic proof does not by itself establish authorship or ownership of the underlying recording.

Read the complete pre-generative-AI provenance and verification method.