Chopin: Nocturne No. 4 in F Major, Op. 15 No. 1

Recording identifiers

ISRC

FRZ119505950

Release date of the album this recording appears on

2002-01-01

CopyrightID (CopyrightChains transaction hash)

0xddeffea890a1f3b5e9ec5fe30fd0e869782a4f8d79830190c90c80a1f58202cd

Copyright registration time

2026-07-30T15:29:48+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-30T15:42:38Z

Bitcoin block

960273

Canonical record hash

sha256:4b0443933a9887b97ab10fc6092de356b891d30d72f7300662aada2886db3e55

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC FRZ119505950

What this proof establishes

This recording was released in 2002, 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.