Tiefschwarz () are a German house group consisting of brothers, Alexander "Ali" (June 7, 1967) and Sebastian "Basti" (December 28, 1969) Schwarz, which formed in Stuttgart in 1996.IMO Records. "Tiefsc
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 0xcb41651c7b145f2c09a6887e7ac1f4b0a8f516f3005e2639cb6de15e0e614f25. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a7b5acf-0178-48b3-9e8d-8c0c855c0d69.json and https://artists.proofprofile.net/proofs/artist/7a7b5acf-0178-48b3-9e8d-8c0c855c0d69.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xa7f0a2517d12a9ae387f48aea1dc9163fbd936556a0bdeaaf14793b224104dad. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEE860100610.
10 Years Of Tiefschwarz Blackmusik Remix Part 1
10 Years Of Tiefschwarz Blackmusik Remix Part 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46dc3b246b8cce0ec6e3907da26766c5f993f98d332281dc47650366141f9f5a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEQ320500047.
10 Years Of Tiefschwarz Blackmusik Remixed, Pt. 1
10 Years Of Tiefschwarz Blackmusik Remixed, Pt. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07424af1ca35907257c113b9afeb2e6405630a3be9815647200694871b896d19. 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/DEDW61200038.
No Message Remixes EP (feat. Argenis Brito)
Mixmag Germany - Episode 009: Tiefschwarz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bd3661591b89d506fdffa6290ccd2d481ea5f75f6d0461cbd678f20e23b3ad. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBKQU1700810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c80fa519cd4037d13025522b774fed0ebc6d07e1e5718cc89a9a79b5ba9be9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEY471981057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69192903103d3b2de0937c8e4de04cf10c5fa8a0abbdac6943311a7f1bf491cf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DECY51134052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f06b5bd6fbd073c84170b9ecdba76d03fe1242d1e905f2caae84a2a82e14b3c. 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/DEPX41200018.
Global Underground #38: Carl Cox - Black Rock Desert
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b060e8ac76b9283ff3696ac64dacfea05667240f5f5c90fe9757cfc1644442. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEDW60900009.
Global Underground #38: Carl Cox - Black Rock Desert (DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7064006f0204369cc36412d3bd3221c2a78e1688aeaeaabee4f4816c44cb69. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBHFW1900292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05871b6130cbf3a488d9abe26b91a6f40f4d23800e56806e384ef7c09727be26. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEN400412401.
Solo: Songs And Collaborations 1982-2015
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ce022daf9088a198c2dc403e9a98c88f74fe087dae2524032de20a6b16d81f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEQ320500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e16a66405113e69ab7e5fb3fc271d8070b4f7892ca93214e5e380a1cf2be58. 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/DEPX41700231.
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