Kristoffer Jonas Klauß (; born 29 June 1988), better known by the stage name Gzuz ( ), is a German rapper and record producer. In addition to his solo career, he has had success as part of Hamburg hip
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 0x2354bc7f5f2da59f9b3f5ba57b262544dbf965a0638d68b2f1a00007337569d2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0c99c15-e5dd-4044-881f-a9298e5b666e.json and https://artists.proofprofile.net/proofs/artist/e0c99c15-e5dd-4044-881f-a9298e5b666e.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 0x182bbfbea97b6faae7ba7b5cc73320a84acb71b0988db61029de734d281ee7d4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DECE72401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49710f32a87fc7617b0ae1126d94148c06dfaa2bbd4f3c8ff1276615927e9dcc. 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/DECE72400776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4842f6a1c4e1ada46416181620e4ef955793c3fe1522ecb52c292b47bbfae1. 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/DECE72400777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1366235b87bd025fdff21e8fe494c03371bb0667866cb1176661605e7b203c4. 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/DECE72400778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7789aa4d903863813a6cb56f5f39faf058284e4392aee78b0ae8f53f94818dc9. 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/DECE72400698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97fa58a695f5a1b972f3bbb09c6f75cbfc4a474ccaee833ca0939e56f4a878d. 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/DECE72400779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6205a3ee7947344f2dfe55d5bb99f31229d55975d1b776dc6a900f17d3e032f. 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/DECE72401031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18d87a2a57e5406ff0dd275368dece3aa46a7be062fd6132e94d64a8d5d7403. 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/DECE72400781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7351ed8159fe1fb81278c69204003a4609cf450691c35b18baf364a1d835bc. 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/DECE72400782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee513d2d0190e9be6e8086fc1920e8d0b2adbbe38b6bb0848f38d444d90c6300. 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/DECE72400783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a17634455f4dd1ea169d4ec14e8ea212308455405f618db73189982789aa389. 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/DECE72400634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10103047197786e581a1380f40ae76c0af1d5abdc8d90258d22b723f0c038d80. 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/DECE72400784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeea5a5e1cb199d32f74ae5153a1393257f6503091b700a54a69af6081ecf412. 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/DECE72400785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2ae83b783ea5ffa378f28ed02266e6a7618288b9e68d455b1a760e34e02351. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DECE72401734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec257b5c40ee96df684d9f988a81edd39b4acc55c8b8671a1d485755b942dde. 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/DEUM71601522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7409c8ce2b2691bd4c48878605891716b08c085b915453c0b47759fdb13b8a3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEXJ21800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cffc76891f1acb1076528bd47ae73bf3196847484412cd9dd19512eca5eab50. 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/DEA621900340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd4afb85078cc9683d41ca2ab7027e853dcf314109df439da78a30074ccb78c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ121640881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b4b36814bf7ac677eb1c1c7f0ea85e08f7f247a79599f4c61615a7f69c80b7. 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/DEQ121429732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc049a64a5c88725691cd2aeaf64ecadbacbd1857e1667431d3e21ee6a2d594. 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/DEKF22400498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340f0ad30a23c7445d0585cc288d97b49e6ded183ec4909b25ab7712ddae38ee. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ121322433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b31fe75655e3102709ffc1c7b80e6c0a8f9a55c6042bae2d9c6dfffcf87fa9a. 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/DECE72303123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745e6001b0cdd9ef4e55cd924a32776d5577869e31cf7f22aca86cd3f4a35d63. 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/DETX91500631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7409c8ce2b2691bd4c48878605891716b08c085b915453c0b47759fdb13b8a3. 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/DEXJ21800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b43b19595e408905d8a147ca0de5ce9b92bdb8b76b9067282d3d9032092beb. 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/DETX91500239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a5cdbd408517c7cadfbe057dba9e19dc393cf40c0434bf07a4e73d8bf76749. 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/DEUM71805105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebad70ca6149de0a84e384be509111e3cfdb3238033a83496d469a0344e2a031. 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/DEQ022117694.
Hip Hop made in Germany - Hits & Klassiker
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec257b5c40ee96df684d9f988a81edd39b4acc55c8b8671a1d485755b942dde. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEUM71601522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b787617cc6f1502412758593cf425c5553eef76383d06567aa429f731a0275d. 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/DECE72202183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e545b880da28a851640a2b2ae840490c1b96c72e3401f7587fb57816acc096c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEUM71800981.