Kotek

Recording by Witold Lutosławski.

Recording identifiers

ISRC
PLB381300254
CopyrightID (CopyrightChains transaction hash)
0xd56b4de7119b4d7e091b840f7a88262cd3ddf8a9a2ca8a6e1b33f9d74442ba13
Copyright registration time
2026-07-06T03:31:28+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-06T06:56:49Z
Bitcoin block
956889
Canonical record hash
sha256:12f0b2457a77ddb931e8c7c71378641c63a395c34099d776fa63d601e8d2235b

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.