ISRC ATTE41700309
Verified recording
ATTE41700309 is “High School of Violoncello Playing, Op. 73: Etude No. 9 in E-Flat Major - Andante Sostenuto” by David Popper,
registered on the CopyrightChains blockchain with CopyrightID
0x6a0b791c1eb5d2d97c793823456b2c39ff547d2d919d3a1b3117aea419ccf0a0 and independently timestamped
in Bitcoin block 960389 on 2026-07-31.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATTE41700309.
Recording identifiers
- ISRC
- ATTE41700309
- Title
- High School of Violoncello Playing, Op. 73: Etude No. 9 in E-Flat Major - Andante Sostenuto
- Artist
- David Popper
- CopyrightID (CopyrightChains transaction hash)
0x6a0b791c1eb5d2d97c793823456b2c39ff547d2d919d3a1b3117aea419ccf0a0
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-31T10:20:10+00:00
- Bitcoin block
- 960389
- Canonical record hash
sha256:0b8b51ffadca24882180ee258f04bcd2213182749d99568540a168a25d938c4d- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATTE41700309
- Bitcoin block existence check
- https://blockstream.info/api/block/960389
Full record
Track page: High School of Violoncello Playing, Op. 73: Etude No. 9 in E-Flat Major - Andante Sostenuto · Machine-readable JSON-LD