Nicolas Demuth (born August 27, 1991), known by stage name Parra for Cuva, is a German musician and DJ. He is best known for his house production. Career Life and early career Nicolas Demuth gre
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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7672d7229afef459c27f5707ea5b9d7424f44f0b11bced8e02dd0fb953a8ad5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6222392-92f2-46f9-aabb-8f4bf1a3a41c.json and https://artists.proofprofile.net/proofs/artist/f6222392-92f2-46f9-aabb-8f4bf1a3a41c.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491d7e49995c2466956a923eee7158ea6bbb723552b9b2b214f7ccf15058ea4a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEHM81400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea69e53535c7f4d61f915ab5b926537b2e85e6305f402449b02cd2458828a03. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEHM81400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a80dab7d90ca1c3b81ea74ad0abecd805ad1fe8eb102477c72ca3abcf935623. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEHM81400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c89cf4d8983504f41cfa80a18984dcddb6d89276bb22dd1c106a5f580485536. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEZ651712015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8539889d32dc449e94a196675a7340bd0fa7942c046155b978abe2787a38bcd0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR9W12032167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcea18d690148ec302f5b118260fda6a98e0c3d5725240041cb5aca55b853c8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM6MZ1825739.
Electro Classics 2.0 (House, Deep-House, Techno, Minimal, Electronica, Future Bass and Many More...)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adecd3e42557c091346a71bacd77f177745bcf3cc3f452e1525d6bd25886bd9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMSNZ1310584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e7a8672d7c394c06c032415ef9a189cf2a4ff42c2f524ac42948f4a5c90ece. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBCFB2300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c91d59fffce3ec987d52961b2f70e15295d535af5e123a3006e5ef2c0a1f83. 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/GBKQU2236828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2903afcf08a58866fe0fdccfaf176a37e7ccf5cb1a2020277805f1848262eaf1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TX2220783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb67191b4bd9e468f0ccbd755c31523ce8df070de86c58974911d67b6f00245. 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/QM7282479467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9280bf89c270eebb2484d23116672939d45d168bba2d2e13edbddd9682415004. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMFMG2370588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f25e63c7e351834b6fc5b6698d708f385c96ae4070a60fa4477cab1446df93. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQ121642104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae998b5aaf5820d3fd106665f08f162f77fdf0983b864ea3d5f1a2d77087c6c8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBHFW2400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fb0fd4007c70f92d748d622378a48bad6723a20566a79a0026e01d12424faf. 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/GBKPL1966556.