Kontrafakt is a Slovak hip-hop rap group which was formed by Rytmus, Ego, and DJ Anys in Slovakia, Piešťany in 2001. History In 2019, Kontrafakt released their fourth studio album, Real Newz, which h
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 0xb48bfacae4bbd41ce3dfcd83085dbf4688cf08dd0c1ab6da0226dfe561f2b05a. 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/826bb399-2e67-492d-97e9-340faf4d6c46.json and https://artists.proofprofile.net/proofs/artist/826bb399-2e67-492d-97e9-340faf4d6c46.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 0x42dd4e435e5e2a1fc099198134796dfc4e9c43cfbf7fe6a883947a7169bb5c03. 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/SKP590400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8735f0247e5b1498bf2f9e0ef78cffd69321b30b7f66cc126e9f4be6bc97e522. 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/CZE140400355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c15af78db32f849caf322fbc9aec91695da255354e9420b3d3745c569b08d8c. 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/SKP590400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dd4e435e5e2a1fc099198134796dfc4e9c43cfbf7fe6a883947a7169bb5c03. 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/SKP590400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8735f0247e5b1498bf2f9e0ef78cffd69321b30b7f66cc126e9f4be6bc97e522. 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/CZE140400355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725f8393de7fa9b9535509f002829882d36857ed4153f8e7420ca964303b84ea. 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/SKP590400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1355d4a0d7a08f30aeceb51367bac77bd3624203152a5aec7db32c26c3989640. 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/SKP590400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296ba81de580485bffcb56199f2b690207d577410c8a0214be7b338ad184e748. 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/CZE140400357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7447bac31cf752a14e352e90989a4a1904161d3e184eb192e5610b020f32db8. 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/SKP590400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9781ed9ffeb24a67b58b19cb7f64dbe734a3e33187dd139c06ac8cfd6f6e98e2. 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/SKP590400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea91d3abebb2d95658d220184f818df7f6fdd1051e1bcb82eae8aa6166c667c2. 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/CZE140400359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f23a65d66ca83989f49695b3a97d985db889d0f9b485ed772c0e8f27381cec. 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/SKP590400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879802569f09748c9fa4721e4a88a0c2bd82a60f269d7d4127520bae4384b8d1. 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/CZE140400360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad79da65386b165b57a241d594dbacdb7dfb785f6320a308132593cbda7b256c. 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/SKP590400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273544d2b27f3905d16252b824f27cf6628ae62ddb9904de8fce63a01a2d5aeb. 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/CZE140400361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ba07c9fb542b5012b19427b3db6a93fa0767fc0fc1cf7ed3d911c4fa1e3bfb. 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/CZE140400362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f1559ed17a6b6ff830b9682a363c66c96c3070da9453e51e74aeba916260c7. 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/CZE140400363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457ec0a6a0bc6c0e4f0c0a3d15a277d4e30123af476626c24bf5c1bbd30f240c. 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/CZE140400364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267860a7429cda03c51b0dfc1633960c9b1c69a5489417e91c880d6755053cc2. 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/SKP590400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd209cb9a263728a53e97177d2dc014aea6ae9c753ea348bfa53fe6626bf4d4b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CZA230700367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd3811a391ee89f12d8e383bd23983f244e7be19fe5d627a1d5692c4032d77d. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/CZA230700378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14cd67d1687d78afe65f0480581631afe0b985956fc499a60604a50bf576f47. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CZA230700385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1059ec4976d2da8368771e822824e847d7eb673f894ed98872be0639b28766. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/SKB331300304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d16c8cb6913d6c4832d767588b88a76137c3ab97fd346a9adc26b76d61cddb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SKB331300313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0295e4cb2144232bfc6782762478726ddb6f6f97cc8c73e1c8ae048ea603888. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/SKB331900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e09f1531794dd8438e1f0acd8ac9ddd3294e91310320ec552fefc7f465f2768. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SKB331900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083b7c1df793d649228730517f70c4b09de88bbf1e6a4ceedc18d066592c92f6. 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/USJ3V1341980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083b7c1df793d649228730517f70c4b09de88bbf1e6a4ceedc18d066592c92f6. 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/USJ3V1341980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00caaed144fcf8d0840cba7e2d7ae6e0c2df49612122b9268b0904c7820f562d. 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/PLA380588013.