Borodin: String Quartet No. 2 in D Major: III. Notturno (Excerpt)

Recording identifiers

ISRC

DEA800125612

CopyrightID (CopyrightChains transaction hash)

0xf293c5bfab1514890914d94008de42a09b52f28a44e63add95b69a0169ab00e6

Copyright registration time

2026-07-30T04:02:15+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-30T04:47:22Z

Bitcoin block

960207

Canonical record hash

sha256:09a8c76e4329e82def237f5753ce86824763fe78c0e104513f52e5d31c1636d6

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
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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.