Piano Sonata No. 2 in B-Flat Minor, Op. 36 (1931 Version)

Recording identifiers

ISRC

HKI192434306

CopyrightID (CopyrightChains transaction hash)

0xf09c8de21d74cfc5539b55e30369804ce508e56c90f8bf388a472a5735eae6c6

Copyright registration time

2026-07-22T16:51:06+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-22T17:48:40Z

Bitcoin block

959159

Canonical record hash

sha256:1e87565b778a69aeb5eba6d2486464e778bca4f7fd6b8e5184c0154fac0f8fc6

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result

What this proof establishes

This recording belongs to ProofProfile's historical evidence base derived from the pre-2022 AcousticBrainz and MusicBrainz corpus. 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.