Etude de concert, Op. 24

Recording by Felix Blumenfeld.

Recording identifiers

ISRC
NLY332202198
CopyrightID (CopyrightChains transaction hash)
0xcc5c7b1caaae5322ad8771a5c3a4cd251faaf1f0f3ac25c1d75690f7328583c2
Copyright registration time
2026-07-31T17:39:17+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-31T18:48:12Z
Bitcoin block
960448
Canonical record hash
sha256:db662ea99ad6312d3414d4ed2be509204ff3d8b9b731a603634abe0c92a108f8

What this proof establishes

This recording belongs to ProofProfile's historical evidence base derived from the pre-2022 AcousticBrainz and MusicBrainz corpus. 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.