Nine Variations in D, K.573 On a Minuet By J.P. Duport

Recording identifiers

ISRC

NLA508841401

CopyrightID (CopyrightChains transaction hash)

0x8b7eaf977244674a0f9c6a4cd4b945af23d6d56e2ac0f656e3d02f5bc4440b19

Copyright registration time

2026-07-06T03:29:07+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-06T06:56:49Z

Bitcoin block

956889

Canonical record hash

sha256:ffea834008f22bc354684235ee50f658d4377f1fd44d1e6683345ba6705665a3

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result

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.