Lech Andrzej Janerka (born 2 May 1953 in Wrocław, Poland) is a Polish songwriter, vocalist, and bassist. In the 1980s he was leader of a notable Polish post-punk/new wave band called Klaus Mitffoch, b
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 0xb41db676068d3b4058863a43dcef445d330ac94f8be6898734c51f99d0447316. 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/73467057-ff0d-4574-b314-7e3c3b8e3ac2.json and https://artists.proofprofile.net/proofs/artist/73467057-ff0d-4574-b314-7e3c3b8e3ac2.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 0xc36812c7ec5ddb87269d5f27836ab80275ed563b1f39cd9bac52daa0723b2c48. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/PLA330101675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd3f6d427549f5716412ea55a1a36b1e1c60dc62d98e49bb5ba9f095d27249b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/PLA330101676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6652b23f1d7ca1f31bd29ae1b888d094cf7114ff5553994a523d4e5f32bcb20e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/PLA330500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416474246af7592c25ae2c86f82e6c9567750c0eb8c2a39395b07736ebbbcc4e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/PLB171200770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763a28d2ae6426140b61f3e1e01520c00713e94c1ac1f5594a961b3b54e085ce. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/PLB171200772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff60cf0bb05264eb689de7bedefef9a97066924d7ec20fc3e8b8afb21c59ae8. 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/PLB171200773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8314e3434f84d12c114fd549db1d7ee634c7b4ae1dfa1196061bc4eeab6ae17. 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/PLB171200775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3323f41a4e701ab6a93fc53092cba555b4c5f2c9ac44e8e9e1ee7dd868d8dd. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/PLB171200776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bbd053d4f55fba0dcca60f0fca77eadcb16a15895c821b2fce797aa5ff2404. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLB171200777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff34808eb9b65224e2d07658e6df5814a7bdb8646b75eb87cc2a026a5f8f779. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/PLB171200778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751888af95e2255172a06eb8d430b7e60cf9f21d940b3029c3645e5c2d18b324. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:40:31Z), 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/PLR641900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b2849793aa35ff3d54b667087157c868ac72da1209d374b304f8fee78315e5. 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/PLR861800086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59746c36e39f03859869217a6241dd1fc02e39c93613b9ac35e6026e216a792d. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/PLB171000322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0744dd385a3bced57829285f62cce2385232fc96112008fcad7c20a7d9557ff. 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/PLB171000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6e184452a3d5a473eaef50e4259f10115b5a19318206718c858a6e5de70900. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/PLB822300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2c1769f952a07866e5fdb821a9cbff452831c206bb6b21a3fcb46b960f57a0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PLB822300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29d38b8865bdef0345d165a8044518f132b126d1e5cd28a6cd7e96eb48a8db8. 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/PLB822300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985482eb1464f8f33cc84a01bd9498b4aa205fa65ba9c310095e66b31728277b. 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/PLB822300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d246d2f91a2cdbdf9ae0ec0154077c43aae7ec0a998cecb6ef862695732f0f. 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/PLB822300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762c2e224782379e8da4fb327f4c257c23691bffd60c99eeea04a6db4437853d. 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/PLB822300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53235c7d8c32866b4ec324890a6bcff159dcd42f829545e87825c0a317fbdd1. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/PLB822300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e98a19558a6982c5d711e7fc67b718d1ce715c9945e77abe6ff7c2d6ba4930. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/PLB822300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee88f91738e2d941b0eed29498b5ea390d406e5b136dbdfb10bebc5fc8ff03da. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:04:50Z), 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/PLB822300206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0f42ea91bf6de0f1e7fd0104f33af76c9d4596952266988b79dc0e35a1c28f. 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/PLA391146110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd25e6df34da37d8c89b9717443b836c74f3752b1604fdd6148b14e7ce0edd7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PLA391146013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaffe8850eaca0c28289bc0510b9a8a9c799bb1659be8c8caa50d52f3c9318a6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PLA391488703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138662201663eb1abad34dea7e4eb907ebefabd5bc7e4deaedd1983f1732612a. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/PLA391146107.
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 0x05db3dd4a7df0562d344d154f04b48e22e3460d6c786070b5eed18732954c304. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PLA391146105.
Ta Zabawa Nie Jest Dla Dziewczynek - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092df01684d952906b36308e11b54498ae5b4d5ced3f09bd32ce87002c162716. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/PLA391146108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0616107c7cfa824d2416e5c674afc6074da3ac4fb0a2302df72f3edbfdda1b8b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/PLA391146015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd7e352822104b98b6224bbcaeb8f137d0b3925abd79369e2ff17963979e257. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/PLA391146106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a4f90e4a0f4dccb7f9bc021cd5f1c3ee3d5791a644d0ffde07a10f65d4d9c6. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/PLA391146012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232b913971453ba7045f1a7b7808dfb82b3834a4ae28376cdd239041d840980b. 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/PLA391146014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dab7669e4f493fc7353432c85a984e08889469a6c19fe3131a9e412d5baea3d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/PLA391488611.