ISRC CH0049900350
Verified recording
CH0049900350 is “50 Variations on a Waltz by Diabelli: Variation 20: Variation on Diabelli's Waltz” by Joseph Kerzkowsky,
registered on the CopyrightChains blockchain with CopyrightID
0xd3977e694a950becf58ee600d78c9d454967ee80681702b7b59a77a0a25ee0c0 and independently timestamped
in Bitcoin block 960397 on 2026-07-31.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH0049900350.
Recording identifiers
- ISRC
- CH0049900350
- Title
- 50 Variations on a Waltz by Diabelli: Variation 20: Variation on Diabelli's Waltz
- Artist
- Joseph Kerzkowsky
- CopyrightID (CopyrightChains transaction hash)
0xd3977e694a950becf58ee600d78c9d454967ee80681702b7b59a77a0a25ee0c0
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-31T12:24:41+00:00
- Bitcoin block
- 960397
- Canonical record hash
sha256:38e1cb41db30cd15c198312f7d7c4d814f2428a88a4bb35443ded9f2a5ad75a5- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH0049900350
- Bitcoin block existence check
- https://blockstream.info/api/block/960397
Full record
Track page: 50 Variations on a Waltz by Diabelli: Variation 20: Variation on Diabelli's Waltz · Machine-readable JSON-LD