Double Concerto for 2 Violins, Strings & Continuo in D Minor, BWV 1043: 2. Largo ma non tanto

Recording identifiers

ISRC

NLA507509708

Release date of the album this recording appears on

1976-01-01

CopyrightID (CopyrightChains transaction hash)

0x8ddc2f429a0f069826d5c75adfe5f05e996d130a163bbe6a7938a7f37a46a2ba

Copyright registration time

2026-06-23T11:49:45+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-02T03:55:08Z

Bitcoin block

956304

Canonical record hash

sha256:dc3f8a02c7976a20b1cea69e3db38388a3024d8d6dcd2b35971708d670124770

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC NLA507509708

What this proof establishes

This recording was released in 1976, 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.