Piano Sonata No. 13 in B flat, K.333: 3. Allegretto grazioso

Recording identifiers

ISRC

GBF078010073

Release date of the album this recording appears on

1981-01-01

CopyrightID (CopyrightChains transaction hash)

0x54d83a25897f331823163531bd68b4386a422bf7ad0118edb8de53eac9e0148b

Copyright registration time

2026-06-05T13:12:28+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-06-13T12:47:07Z

Bitcoin block

953513

Canonical record hash

sha256:ef8977cc9ec1781599e576295a84f1f4825c7a2d0efd4f9b02900178df98efe9

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC GBF078010073

What this proof establishes

This recording was released in 1981, 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.