ISRC QM4TX1777243
Verified recording
QM4TX1777243 is “Lied: O Welt, ich muß dich lassen” by Heinrich Isaac,
registered on the CopyrightChains blockchain with CopyrightID
0x04c6263eaf13414b66fe76106da206de50a168e1f09e6618b4ed45e664797ecd and independently timestamped
in Bitcoin block 960418 on 2026-07-31.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX1777243.
Recording identifiers
- ISRC
- QM4TX1777243
- Title
- Lied: O Welt, ich muß dich lassen
- Artist
- Heinrich Isaac
- CopyrightID (CopyrightChains transaction hash)
0x04c6263eaf13414b66fe76106da206de50a168e1f09e6618b4ed45e664797ecd
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-31T15:20:15+00:00
- Bitcoin block
- 960418
- Canonical record hash
sha256:10dd89e6d822a071aabb30fe0b40d3d6fb0a866e95d02b61a24177fb9a9a6076- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX1777243
- Bitcoin block existence check
- https://blockstream.info/api/block/960418
Full record
Track page: Lied: O Welt, ich muß dich lassen · Machine-readable JSON-LD