Piotr Fronczewski (born 8 June 1946) is a Polish actor and a cabaret and theatre singer. He is regarded as one of the greatest and most popular actors of his generation. Life and career He was born i
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 0x3f03533b83fdbb6bc077e55d3cd6590f461737f9a939d03e89a81abbe92a6f8d. 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/279d4e10-1ea6-4450-9699-f16601b1178a.json and https://artists.proofprofile.net/proofs/artist/279d4e10-1ea6-4450-9699-f16601b1178a.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 0xb8a5e3c32f317e01863ed4cd1d3b38b78d31ab2ec361b55af05e57d2131de666. 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/USWD11676234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4221132c8056dc8c0e7cc4979dadf5156c12ed408b99c0400d73698924929c43. 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/PLA140125004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd382f647da99b93d24cb60d66edec86e3edbf2992d66bb0c460b7d15bcb06c. 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/PLA140125006.
Sen o Siedmiu Szklankach - z filmu "Akademia Pana Kleksa"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d63f114d7daac23236cc6cad2410e01af96ef2362884c7c1462794c7bbf9e2. 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/PLA140125013.
Księżyc raz odwiedził staw - z filmu "Akademia Pana Kleksa"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6e7ffdab2728d53fcd7bd4a06642ea4e036cd9cf82ff1395b56304d2f83e32. 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/PLA140125014.
Droga do Bajdocji (z filmu Podróże Pana Kleksa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bba5ca2bcd54334308e679cdaebaa794f9151c7c2273ed8f41214b00149fed5. 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/PLA140127002.
Z Poradnika Młodego Zielarza (z filmu Podróże Pana Kleksa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc14d303a6f0432431d965742c0c31c20dabcd919a165d23fba87101546b85f8. 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/PLA140127005.
Ballada Okrętowa (z filmu Podróże Pana Kleksa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4f9c969758d4d970e61d15666f9445c862e26811429027bfb5fa7cf8627864. 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/PLA140127006.
Prezentacja Aby (z filmu Podróże Pana Kleksa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d269acfbcd5748445acc11daed870e9321e9770efeb553f72f5908af1e3145a. 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/PLA140127010.
Jest tylko ekran - z filmu "Pan Kleks w Kosmosie"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181842c8a16dfe0e2346a88552a692199122ccdaaa105cda335efe4af56952d7. 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/PLA140126004.
Planeta Fantazja - z filmu "Pan Kleks w Kosmosie"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4f01f5c9ed7e4583f5d037c5bfc26f1d68d325d4d86b69b43656556a7f74fa. 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/PLA140126008.
W Labiryncie - z filmu "Pan Kleks w Kosmosie"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9736daf7cf30efe5c3db330b57c149d67d46c7dfbbc05021e1a5c6c5104f6dc9. 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/PLA140126012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7f5457eb495e55167927c8c793a0ff5a45bb54fd8777200b96d770f43d82c8. 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/PLA391592307.