The Nutcracker: March

Recording by Pyotr Ilyich Tchaikovsky.

Recording identifiers

ISRC
HKI199706607
CopyrightID (CopyrightChains transaction hash)
0x63b55744516fbcbdd5e1cf754bb844c94ab339908905882c52d78c54dce11e6a
Copyright registration time
2026-07-06T09:15:57+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-21T20:59:46Z
Bitcoin block
957061
Canonical record hash
sha256:924d4de7682999f0aa9f6df4cf143a51192a04e59b11100d12d65e1385ab6a3f

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.