For the French politician, see Michel Pezet. Jan Paweł Kapliński (, born April 18, 1980), better known by his stage name Pezet (), is a Polish rapper. In 1998, he debuted with Onar in Płomień 81 and
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 0x8d8cd8ec3a572fc22ec0c321bea32788623eae06c1fb53194612de29c26f0c72. 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/80d8a4f9-1758-4d57-bb31-99fc19bb9f0f.json and https://artists.proofprofile.net/proofs/artist/80d8a4f9-1758-4d57-bb31-99fc19bb9f0f.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 0x75d8ee9dd55e881acd48484bab7a4d884d1e6bf97357c5c723efcbd2b7eec31b. 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/PL86E2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dad77057aaf7d0d821029f142143b3243328448592c37964a7af289268e63e. 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/PL86E2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e6242ab434a2ad00adbfd83e6eb71f1bbc0d3a1e68541d9d514f01859fbd5f. 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/PL86E2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3519a1b88eb00307533ca229afe8c95e0c6b40274af6f83e7583c20ab645afd8. 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/PL86E2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbda5fc066fe59e50fb378d013951b0a685d75a9c064fc49d29adc8f888b7332. 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/PL86E2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf22fc1cf2e814756c5d08383ded20015e40457945094a3d5594e2d48087280. 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/PL86E2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43abb088dfd3d06b9e865a89452fff826fcc4cc93b9f664f576b4167ee0d5b4c. 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/PL86E2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cc08443ddde22196ed864b98123fd27ed6e0dee3322082b7134100b1536a55. 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/PL86E2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ee41750857278f6c56c3867f547cf2eb93e584c669c38e75e8540116ea61a5. 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/PL86E2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497557fc69b33a7b9173391465443ab9ec91b7727dfc28044fe3aac04e70e341. 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/PL70D2300281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2492afef043f544855a02820491be9b3476db01e8d322ead8c0d1e67063364e3. 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/PLI292100252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc728f6fd34567cebe9a5f76d6903006a5e98ba518b71ffd8fcacbf58d8da12. 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/PL70D2200258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72caf75f27ed17cf34bec87aa214642cb1f9b93cea14832c6314ba84faf3f899. 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/PLF242108545.
Petrolheadz (feat. AMEN HEWRA, Phunk'ill)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bd6f65a00ef8823bfdaf0a85a8d3273047ccefaacacfa276186de289b1e44f. 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/PL88L2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6405bd3f60a753f302947a99cdc0069d7deaa33e2037ac9f6f7976fc37a4dace. 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/PL44A1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf744f7643c532667041c7f81b5507f07f868d15b14c4b505b974c17566ab3e47. 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/PLH181200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2492afef043f544855a02820491be9b3476db01e8d322ead8c0d1e67063364e3. 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/PLI292100252.
Jest nas 2 (feat. Pezet, Z.B.U.K.U.) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4abacef664f93ee7e3bb94d896e13eb02680dd161d88e3080863d20c0c908ee. 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/PLF241401118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061eb1d512d00f7aa451f2c0cad83c0e988edb4a4226435b56b25debb378519e. 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/PLC071203002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe666c96e8796a0d2206b3f928691e159427448c23b18ac56c6fb4d11952dbe8. 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/PLI369630130.
Nie patrzę na innych (feat. Kajman, Pezet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f47464d90acd2ef7c46504396d49d2be3d72130188f6cd26ef6ff788d129eab. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/PLF241300421.