Witold Marek Czamara (born 2 September 1984 in Kraków), better known by his stage name Donatan, is a Polish musician, music producer and sound engineer. Donatan along with Teka co-created RafPak. Lif
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x6b230d75778300cb9eee3836a1ede961ab7a94dee5b1ce9d107ceb18d963f805. 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/e4746560-1983-4e2b-a37e-3a62f6dcd7a8.json and https://artists.proofprofile.net/proofs/artist/e4746560-1983-4e2b-a37e-3a62f6dcd7a8.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 → block OTSBitcoinBlock must exist at that height 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 0x5cbde5d0ada12cb020f1961afc0b791d993f4fc164720bf1d91f95851b35170d. 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/PLH181200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ec18699a787fc855b00991cad6800e1d25e9cccaa189b3607b6dfee57bc6da. 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/PLH181200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031a961250b8b355b12c685113dccc9e65cc3aab16d52b7a23972827e96035b6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/PLH181200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf744f7643c532667041c7f81b5507f07f868d15b14c4b505b974c17566ab3e47. 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/PLH181200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde721f126f87695b36f333f6940089827e80bc94c2b1b6f2f6e140c67f5e9c36. 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/PLH181200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad63748afefc6cd57ad0917340a6951ef8804d401dca44bf2c9b7507c6f9789d. 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/PLH181200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bccc02c70ed3dff545854a20cd5d77b46eed211530a7182c946dd9b4b52218. 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/PLH181200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f53866e0459cf14799f017699e0b5704349202ffb96c231ded498b94b9d159. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/PLH181200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b85d7aa4205727bb2443143e73e519d093408d583ba10488bc651b44dd5c3b9. 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/PLH181200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc1f3643b7128f43fb2b40d758d6e081ed53a2744a5f55bb327159143a0f550. 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/PLH181200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5d18fec5aa1bb8f2be6d0a2e57bc7311a81c7eb43c67ca1e318bf85b40bc33. 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/PLH181200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14b7cb45e223006d94d7109c9786149be3c8fab94d7763a7712cefd08bbe579. 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/PLH181200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b87af7480d899cee9054536c9f23469bda056ee550d2cab35d38ea4241ad610. 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/PLH181200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49395ed011b70545fd5e22a423131788481ede22622c59bee9a03d06baf5b9e1. 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/PLH181200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957352cd9baabc970e9a11235be40d869a4c6d816630df4d721cde8c1089ab5b. 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/PLH181200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab53f6dbb820ffe494fdf017c0c6cfe95365c0d6bc83b0b62f9f62a416086ce8. 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/PLH181200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0f73fa26ea6fa3595dcdef025aea0f78207425201145068fa1bda1f76ef615. 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/PLH181200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba86c1414e91de9373cd0587975ed71283b09d016ef840b21ad01c4d92eb704. 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/PLH181200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8c2d03873f9996a84ebddc1f1c5850b993aaffbf43c24c389bbf7367989155. 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/PLH181200015.
Niech Obdarzy Niech Obrodzi - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28207a31e4ae8a10e8877da466da54fe4337765ed110e9fd655347d8d98e6005. 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/PLH181200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1224317437ec37cdba96e9b510de5f0a5737bf4d3b93c020a2a188682e567fae. 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/PLH181200016.