Old Hat

Recording by Marcin Wasilewski Trio.

Recording identifiers

ISRC
DEB331967811
CopyrightID (CopyrightChains transaction hash)
0xb3ea05672cfde87c235b13da5f4ff86dcf6806bd85c671d46530b4c54e40edea
Copyright registration time
2026-06-27T23:37:23+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-02T16:51:38Z
Bitcoin block
956375
Canonical record hash
sha256:977594197077f99e9b62e2e3ccc79d84a6c5ef04e715cee74295c96c071b655f

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.