ISRC ATTE41700321
Verified recording
ATTE41700321 is “High School of Violoncello Playing, Op. 73: Etude No. 21 in A Minor - Allegro Molto Moderato” by David Popper,
registered on the CopyrightChains blockchain with CopyrightID
0xb727353257316e57c4e72cc9f2c790bd38b1b76570ba69c79b415210c2b96b07 and independently timestamped
in Bitcoin block 960455 on 2026-07-31.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATTE41700321.
Recording identifiers
- ISRC
- ATTE41700321
- Title
- High School of Violoncello Playing, Op. 73: Etude No. 21 in A Minor - Allegro Molto Moderato
- Artist
- David Popper
- CopyrightID (CopyrightChains transaction hash)
0xb727353257316e57c4e72cc9f2c790bd38b1b76570ba69c79b415210c2b96b07
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-31T19:53:13+00:00
- Bitcoin block
- 960455
- Canonical record hash
sha256:1b25601279a752f94801f38f391e840116b4528533e7e888344f64ae8bc7dfbb- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATTE41700321
- Bitcoin block existence check
- https://blockstream.info/api/block/960455
Full record
Track page: High School of Violoncello Playing, Op. 73: Etude No. 21 in A Minor - Allegro Molto Moderato · Machine-readable JSON-LD