Chopin: Piano Sonata No. 2 in B-Flat Minor, Op. 35 "Funeral March": III. Marche funèbre. Lento

Recording identifiers

ISRC

FRZ111001612

Release date of the album this recording appears on

1965-01-01

CopyrightID (CopyrightChains transaction hash)

0xb0487eff72c6a2cdfb90626568cd7859a645b0108d13570e44504f8e46ffa710

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-30T04:47:22Z

Bitcoin block

960207

Canonical record hash

sha256:b54307b64b12f321d4eba13f66b50cf49a1f7c6c9c5af988b00bcd2495116964

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC FRZ111001612

What this proof establishes

This recording was released in 1965, 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.