Madama Butterfly, Act II: Humming Chorus

Recording identifiers

ISRC

GBAYC8702054

Release date of the album this recording appears on

2019-03-29

CopyrightID (CopyrightChains transaction hash)

0x86424adc83b9cf7dfd31904d34519c4db9d2f48f5309db217d92f7f9eb0e9554

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-30T08:30:10Z

Bitcoin block

960229

Canonical record hash

sha256:480ba81ac2bce0de724130ea363500ad02f691a6b17c1965a38024f76aeb7d2f

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC GBAYC8702054

What this proof establishes

This recording was released in 2019, 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.