As time goes by

Recording by Contrabass: Karel Vejvoda.

Recording identifiers

ISRC
DER750623603
CopyrightID (CopyrightChains transaction hash)
0x5d65b5fb686a44869346557d80af6d43c4f0f62bd29de987d5acb43b04b0246b
Copyright registration time
2026-07-22T14:26:59+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-22T15:38:35Z
Bitcoin block
959144
Canonical record hash
sha256:1551775dfa1e9211d44d415cfd89dd707cd946de7f7dddaf77e2260fa01d9f8f

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.