Tosca / Act 1: "Ed io venivo a lui tutta dogliosa"

Recording identifiers

ISRC

DEF059030923

Release date of the album this recording appears on

1976

CopyrightID (CopyrightChains transaction hash)

0x709e2c642576346acd3e01e48445759365478fd0c15621d750a89814d108e12a

Copyright registration time

2026-07-30T12:23:23+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-30T12:45:34Z

Bitcoin block

960258

Canonical record hash

sha256:2204f17a43b814ffd99cb7c90bdbe55ee1399823b1f4b71efc00d42c79e10fa7

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC DEF059030923

What this proof establishes

This recording was released in 1976, 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.