Prelude and Nocturne for the Left Hand, Op. 9: No. 1 Prelude in C Sharp Minor

Recording identifiers

ISRC

GBF071405121

Release date of the album this recording appears on

2015-05-15

CopyrightID (CopyrightChains transaction hash)

0xd64d0a5c851d235fd9afa8ad6c546d340f748e449ecd5902ef8dda3eba69548f

Copyright registration time

2026-07-31T10:49:02+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T12:24:41Z

Bitcoin block

960397

Canonical record hash

sha256:1dc0b2217fa5bd5e457b32ff9c75293442d87f9b9a7ce5a275118701706f9f53

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC GBF071405121

What this proof establishes

This recording was released in 2015, 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.