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 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 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 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 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.