12 Etudes, Book 2, L. 136: Etude No. 4, "Pour les sixtes" (For sixths)

Recording identifiers

ISRC

HKI190007304

Release date of the album this recording appears on

2001-04-16

CopyrightID (CopyrightChains transaction hash)

0xb370df623dce91c8d0a9248c0fac9ca7bd22a10667d99987f7df28b2efd6ec9f

Copyright registration time

2026-07-07T19:29:22+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-08T03:39:04Z

Bitcoin block

957122

Canonical record hash

sha256:6a471a6024d4243ec81940385e95050f0acd3f8800028d30bb88273ecdaa6607

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC HKI190007304

What this proof establishes

This recording was released in 2001, 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.