Sonata for Two Violins in A Major, Op. 3 No. 2: I. Allegro

Recording identifiers

ISRC

CALC41701114

Release date of the album this recording appears on

2018-02-02

CopyrightID (CopyrightChains transaction hash)

0xd42a383ccf4d5a05dbd3192e3f41e88a0afedabdf186ffcc2b1c1b30557c6d15

Copyright registration time

2026-07-07T05:43:20+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-08T03:20:19Z

Bitcoin block

957118

Canonical record hash

sha256:b93edab728859f2dc17514c63e0b065f723d16669375319c8984e2c4e0d8dbb6

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
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• Recording evidence summary for ISRC CALC41701114

What this proof establishes

This recording was released in 2018, 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.