Tosca: Act III: Ah! Franchigia a Floria Tosca … (Cavaradossi, Tosca)

Recording identifiers

ISRC

HKI199092120

Release date of the album this recording appears on

1990-11-02

CopyrightID (CopyrightChains transaction hash)

0x525ccabbddfe1729ab171e68aa3aed709e482d260308d701ca48967f4758fda6

Copyright registration time

2026-07-31T04:35:22+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T05:17:02Z

Bitcoin block

960348

Canonical record hash

sha256:7aa5c8d293f15ddff6265cf7b84c1a7532c21e58ff96e2b9cf2b4ed69f512de8

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC HKI199092120

What this proof establishes

This recording was released in 1990, before generative AI. ProofProfile's catalogue derives from the pre-2022 AcousticBrainz and MusicBrainz source corpus, and 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.