Piotr Rogucki (born 5 May 1978 in Łódź) is a Polish singer, musician, and actor, best known as the leader of rock band Coma. Rogucki is a member of the Polish Society of the Phonographic Industry.
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 0x8795f2aa5ab6cc9b43ee16e88bca2e71debe5bb23e90ff09c5bf808d5b606523. 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/9df3521e-f26f-4e20-bae6-96396aef225b.json and https://artists.proofprofile.net/proofs/artist/9df3521e-f26f-4e20-bae6-96396aef225b.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 0xa95e0aba1078bf6d22df3b1a08820ba7271f47f38cc8f471262eed56fe00d2d3. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:42:28Z), 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/PLI361015390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dcbd1fff9d9dff075e8ed3e775100193c6941ccf062edeb686a65a7a7e1ab8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PLI361015410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb903263f57bcf5476b0de257c03796fce433093b5e7b253dcebc57d691d2e5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PLI361015420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01605bc0ee6b992d888e2b4f96eeec22fef5f5952777d3f2e10796c2d6243611. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PLI361015430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9591796b528a37e9aa717015133796e54a9ed398c291d0f9c595e346079409c1. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/PLI361015440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745599e08d5d163ce869add5649eddb67f48e57842c833e5ee7c3e0fba504521. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PLI361015450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb1aa6392c9d1b48b1f2d26d4032d4f772ab7a6bf9d5a6e92c9abb9d1b0a95e. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:19:29Z), 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/PLI361015460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e944f512104db8f3afe4f13751d692e0d756c471bc6acbed6d5c06798db3f9. Chain 2 (Bitcoin): anchored in block 957527 (2026-07-11T06:08:55Z), 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/PLI361015490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45eff0b85ca29e1d9c92106e3af6ba93c695793afb38b1770b0e45c08d6ec1a2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/PLI361015500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9748917176fc0824309e41840c2155962dcbfb83e873ca1759ac9d5b227299ec. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:38:30Z), 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/PLI361015520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a724d0ad8f8ee2f7e3219da86866f38a807de75ab24671681418a1ef22496d5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PLI361015530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb51245d6f2f2365335326a816c2a646379cf90bf4a242ed052e1914bdc6e011. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-17T00:13:02Z), 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/PLI360873120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab106074d32c90b6a24af9f6b9c1e9df5ee3fcc2ba4ef910c9c89706fb28c4ef. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/PLI360873130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a49092e374d446f8443af8e92e22a797989466a8c407b0b6411fd95c5a66f2a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLI360873160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4591d1627354e048c511e477a8ef6ff054282182c5ce49ec638f0cfa5ae10e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:28:44Z), 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/PLI360873170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba15e36f8c1e6232daf6d8449fcb5d863eeca52a99f2bb29f75fa09f1f6b731. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:53:55Z), 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/PLI360873180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c29491057e854073724c05f7d0d06c4c25cb07d7ee73181f19b35f14a7995b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PLI360873200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77140e9d481b183c59dcff293cd3edb8461a8eea5139126b87bd098233d1d2f2. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/PLI360873210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6723a641be869ceb3bcdc395a4b6c10d90f47b4a5e77993c05d24c0d4e12c1. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/PLC591500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd02cfc4e33895e98c6d5a0b52df05f2519e24a64736acebcab6d0c3c0af726. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLC591500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff83d7bf4355d3b1c15f89f66da34a156f4a30705d8073bb3b77a3695db8bfe. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/PLC591500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cab04162a641fd7952b24f344fa58eaf99691ecb7a98539ecb52915c2e8d01. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PLC591500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0937bc48be82be14b13a05edf47c8f68cbf28c1cc8c57017b403c4c37d97eb74. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PLC591500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e6f20e1fc46d6504d3b96a5462f1410847364e454ae3e2f91cfa7ac865c269. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:58:17Z), 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/PLC592400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb160cf125a06d66f65eec3ad8968b5e4503a4fc9b9f780488169a64265b61e00. 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/PLC062229721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cac5021d66a44b492c23f6317bb7323c05024ab88fadcdef6443bd1393d7b1. 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/PL22G2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9020e40dca8a1c90fb0af28013a6dd0acf46d80806f4ded975c907004f708e74. 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/PLUM72100639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3e43f5edaeaf8c0494286bddb4a7ea46af53091880facd4607e42f8227d42b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PLC591700095.
Przegląd Piosenki Aktorskiej we Wrocławiu
Laureaci Przeglądu Piosenki Aktorskiej we Wrocławiu 1976-2019 (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33e29974cff56333f583e9698edd69699f250f9b7f6e386e55cc8a889f8cfcf. 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/PLA291800136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f881120e894bfdcb9481db8ae4e279fae211ce5f3f84c5a75b19f5962b59fb. 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/PLA391715403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ce9bc74ca810461354d456caf8be780417a0e6c4a81cfa2978c324c899be79. 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/PLA391715502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318a061b8c2e160f1950402299e9d07d26dcd96e8d4f734423bad30c2eb18058. 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/PLA391715505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f110f11b370ec8df69fb509cd92d26a9ab8caafc368d5a0c40056564ac17c3. 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/PLA391715509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bbfb18f25a53c09246427f8547f29748a3866f655db89946b8561d9551ced4. 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/PLA391715510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fa69e91b029d2a290af1e30269869e81e6f04191fcdf0d045149f23e58a32c. 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/PLA391715513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb160cf125a06d66f65eec3ad8968b5e4503a4fc9b9f780488169a64265b61e00. 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/PLC062229721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a71e5efba53adc2c9b1a8b203dc633543e6ca36d7134bd844954f17fedc2f16. 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/PLL581700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29d34bbc49b24753e59caa935161b636ce4b4657b6706502e7f23f7697f7fc6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLA391929201.
Roman Kołakowski Zaśpiewany (Dobre Piosenki)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9d545bc53de9756d505c1dfa3438dad23b0d67116382217238a476934442f9. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:55:17Z), 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/PLB170500169.
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 0xa1f2a8cfca525a12fe7fba5d96753e0b894f88372027bbda494122612fccaa94. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/PLA391715414.