Piano Concerto No. 21 in C, K.467

Recording identifiers

ISRC

USX761116702

CopyrightID (CopyrightChains transaction hash)

0x712e3608b655ea2b7e5ff722671e91ec7b988a135b615160893398980f760a5d

Copyright registration time

2026-07-31T09:34:43+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T09:50:11Z

Bitcoin block

960381

Canonical record hash

sha256:ef8aaefe18d1705c0cf230475c020c64eb7b05d45e9264eaedb68ec98751ea45

• Verify the CopyrightID on CopyrightChains
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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.