Improvisation on a 'Concerto Generator'

Recording by Laurie Spiegel.

Recording identifiers

ISRC
GBBCK1701193
CopyrightID (CopyrightChains transaction hash)
0xdf9c4476b49a692bff13b86587cff5b50eefe6562426be1b9c0c5a419981884e
Copyright registration time
2026-07-30T21:57:18+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-30T22:27:30Z
Bitcoin block
960321
Canonical record hash
sha256:e8d96e89cb58609e29bfcf81c443a289d2e79fcd2ca209e5e65d476954dbcf01

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.