Vrba

Recording by Marta Kubišová.

Recording identifiers

ISRC
CZA166900052
CopyrightID (CopyrightChains transaction hash)
0x6df08d35b9ec09b4688bae6fb885d272dc94eb8dd8fb6dba2b35c63e38d8710d
Copyright registration time
2026-06-24T04:38:35+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-02T05:09:12Z
Bitcoin block
956312
Canonical record hash
sha256:f705fdfb6cd9c73d17e54f050c7d48cd48966197d067145d3c0f01047b13694e

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.