Spiegel im Spiegel, for Viola & Piano

Recording identifiers

ISRC

NLY331005678

Release date of the album this recording appears on

2021-10-29

CopyrightID (CopyrightChains transaction hash)

0xdf3953b0341842b0303e3f6cf4439c95d719814688552829a88005b7b06fa86d

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-29T22:48:59Z

Bitcoin block

960160

Canonical record hash

sha256:efc33a686df044166e93f11a7396f8abe599d461e0be7dac3d693d28a2a70287

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC NLY331005678

What this proof establishes

This recording was released in 2021, 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.