Sonata for Two Pianos in D Major, K. 448/375a: III. Allegro molto

Recording identifiers

ISRC

NLB152100051

Release date of the album this recording appears on

2021-01-22

CopyrightID (CopyrightChains transaction hash)

0x0c6fe7239b74e0ad5313d29874fff8377c8c077528a61753a708a60fe999bc69

Copyright registration time

2026-07-06T10:02:25+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-07T14:50:41Z

Bitcoin block

957052

Canonical record hash

sha256:1eb735fa67315c532c7ae207034046cee640028a618368eb5f724481c1a669e3

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC NLB152100051

What this proof establishes

This recording was released in 2021, 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.