Ludwig Schmidseder (24 August 1904, in Passau – 21 June 1971, in Munich) was a German composer and pianist of the "Light Muse". Several of his Schlager compositions are still popular tunes today. The
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9693ba0eacd094946d6feafde9da7bea88dab3da71a594e1fd8bd7583c62bc5. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e05a37a-5c44-47a0-bb8b-a8ef5d4014a1.json and https://artists.proofprofile.net/proofs/artist/5e05a37a-5c44-47a0-bb8b-a8ef5d4014a1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
History of German Film Music, Vol. 6: We Make Music (1940-1942)
History of German film music, Vol. 5: We Dance Around the World (1938-1940)
Immortal Voices Of German Radio: Rosita Serrano, Vol. 1 (Legendary Recordings 1938-1950)
Dites-moi je vous aime (Tell Me You Love Me)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e045f2496b95e9afb4ecfd144c43c8bd612a7f528c2c78836dd0ee4702833f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEL111300174.
Frauen im Metropol: Komm doch in meine Arme (Remastered 2022)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60eb42e102cc27eea6daf6fdd07dd8f947d256570a35ed20fee66ec467e4013. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEL112201530.
Melodie der Nacht (Melody of the Night): Tango Marina
Glamourwelt Berlin, Vol. 8: Die großen Berliner Tanzorchester (Berlin Swing and Dancebandsfrom the Weimarer Republik to Second World War) (1933-1944)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdf074dc6e487716aa486740b7ff131eadbea6c13c0ee582706dd32023e131e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEL111200531.
Melodie der Nacht (Melody of the Night): Schon ist die Welt
The Golden Era of the German Dance Orchestra: Berliner Nachte, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce6e9b7f261b6dec17d427eae8f70468efc1f93a519faf9d553839f62c0feac. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEL110500150.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch