Piano Sonata No. 11 in A Major, K. 331: III. Allegretto

Recording identifiers

ISRC

DEF059002041

Release date of the album this recording appears on

2017-04-14

CopyrightID (CopyrightChains transaction hash)

0x809a11f9dd77b2457574605fd2c1966e14a86669fa14e457f68740641c032937

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T15:59:18Z

Bitcoin block

960427

Canonical record hash

sha256:b3ae3d634fd69edfef5fd205dcd1138009d53f3a76300ddce9be6776d044ad1a

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC DEF059002041

What this proof establishes

This recording was released in 2017, 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.