Chopin: 24 Preludes, Op. 28: No. 20 in C Minor

Recording identifiers

ISRC

FRZ111001515

Release date of the album this recording appears on

1963-01-01

CopyrightID (CopyrightChains transaction hash)

0xf93f2d712a1e5db9483681f9ddc6b8a94a63f98f6b756b2838a49640a770b13c

Copyright registration time

2026-07-31T17:22:04+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T17:29:52Z

Bitcoin block

960441

Canonical record hash

sha256:8d6291de0354ead12b5114ad4c97d8bfe5d7d327a2de7fce5e0bc2534a9cae9b

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC FRZ111001515

What this proof establishes

This recording was released in 1963, 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.