Markus Alexander Uhl (born 31 August 1979) is a German politician of the Christian Democratic Union (CDU) who served as a member of the Bundestag from the state of Saarland from 2017 to 2025. Followin
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 0xcbb5f56d4235874e4e00dab1127f421b752ccff1a9628b3439d7cd390a4ada6d. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e0dd95f-4674-4059-b7cb-6c0406ba8c7d.json and https://artists.proofprofile.net/proofs/artist/7e0dd95f-4674-4059-b7cb-6c0406ba8c7d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Fantasia in F Major, FaWV O:F1: IV. Un poco allegro
Johann Friedrich Fasch: The Four Day Times
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 0x6ad61eea27ac7dfb8b5bf50b7d87b645de8e6058045d060c596d777a4207eeea. 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/DEB902400504.
»Freudenbezeugung der Vier Tageszeiten«, FaWV B:3: I. Prolog (Phoebus): Der Rauch von eurer Opferglut
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895e58221ff78ec51450d939f154a3cf74e2b0538f7d4820a4f63640fe1f9ef7. 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/DEB902400505.
»Freudenbezeugung der Vier Tageszeiten«, FaWV B:3: IX. Aria (Hesperus): Schlagt ihr Stunden teilt die Zeiten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d9c52e5bc5b47d3aa101241214acfd75a23067fa4bf0349d25bdeba75f00cc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEB902400513.
»Freudenbezeugung der Vier Tageszeiten«, FaWV B:3: XI. Aria (Cynthia): Schlaf du Herrscher dieses Landes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8952ba1d06e7a84501ea02efe5e26237bd1207fecf2f12fcc42dc83e0d462492. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEB902400515.
Fantasia in F Major, FaWV O:F1: I. Lamento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95d673a79c9ca87b1299edb3ef137a21f1ff9af6b7383108deab655f8ca9aac. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEB902400501.
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
Fantasia in F Major, FaWV O:F1: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f139ed89bab548a6f8e1929bbd8478bea7cc2447cdc1b83583385dd8bc386c5. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEB902400502.
Fantasia in F Major, FaWV O:F1: III. Largo ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7cec76b456178430938fecdde3d16868450aa0330db93962ede8d8769d993f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEB902400503.
»Freudenbezeugung der Vier Tageszeiten«, FaWV B:3: II. Rezitativo (Phoebus): Dass Menschen auf der Erden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32768811bb49b7f74c66060dcf6726c6ea3ecd346567e5e3c2d1aa12dcc64ffb. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/DEB902400506.
»Freudenbezeugung der Vier Tageszeiten«, FaWV B:3: III. Coro: Meine frühen Morgenstunden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9134d3884cbd7bfd1b9922556a9efe044fc22fdb3daff935b9cab9492214a0. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEB902400507.
»Freudenbezeugung der Vier Tageszeiten«, FaWV B:3: IV. Rezitativo (Phoebus, Hesperus, Cynthia, Aurora): Aurora, die vor meinem Wagen schreitet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785c3ff131a84aeb3a3e0275ee7eb5767bba24866a46fa411ab0f6b92ac246f3. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DEB902400508.
»Freudenbezeugung der Vier Tageszeiten«, FaWV B:3: V. Aria (Aurora): Mein erhöhtes Rosenlicht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c413fd9af744bb550fba49781e1d0fda5bd8a7fc91f55761382244446a5cc2. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEB902400509.
»Freudenbezeugung der Vier Tageszeiten«, FaWV B:3: VI. Rezitativo (Phoebus): Wahr ist‘s, das allgemeine Hoffen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bf4c03519ae8404ee2d23f9fceb9a3a4267cf55a1728b8a86b465fe1bf08f1. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEB902400510.
»Freudenbezeugung der Vier Tageszeiten«, FaWV B:3: VII. Aria (Phoebus): Mein Glanz bestrahlet zwar die Welt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20b98600809ba907bbb481f09681e5ec722647a06ba52de4d6690f130ebc888. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEB902400511.
»Freudenbezeugung der Vier Tageszeiten«, FaWV B:3: VIII. Rezitativo (Hesperus): Wenn andere den Tag anstatt der Sorge
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb036d6d38472909305141e29db0623b240f51d3f5922bb7003c90ccfde81a02. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEB902400512.