Keyboard Sonata in B Minor, K.27/L.449/P.83: Allegro

Recording identifiers

ISRC

USB8U1006856

CopyrightID (CopyrightChains transaction hash)

0x52695a6b7df22193e319fda37b07e7ba392c20bd63d88c6605c422b94b89aa1d

Copyright registration time

2026-08-01T01:19:15+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-08-01T01:44:32Z

Bitcoin block

960494

Canonical record hash

sha256:7567f6c4c90eb6bacf7b52adb1e779a487890f5834e5ed42c4563c8fefc2c448

• 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.