Mayer: Valse mélancolique in F-Sharp Minor, Op. 332 "Le regret" (Previously attributed to Chopin)

Recording identifiers

ISRC

GBAYC0901431

Release date of the album this recording appears on

2009-10-05

CopyrightID (CopyrightChains transaction hash)

0x61f879e5b642374ebf711128ae5def2655d1ce3ae6a37c555c79e49e0cbd8435

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T03:15:04Z

Bitcoin block

960340

Canonical record hash

sha256:76a1f21b50fbd04f1876ff7fa873cc5c099c6331b70898c6ca0c396fe55474ce

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC GBAYC0901431

What this proof establishes

This recording was released in 2009, 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.