Urszula Bogumiła Dudziak-Urbaniak (born 22 October 1943) is a Polish jazz vocalist. She has worked with Krzysztof Komeda, Michał Urbaniak (her ex-husband), Gil Evans, Archie Shepp, and Lester Bowie. 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 0x453dd86573dc655c5631c3fde0052a74c8e46bee97f8b27d3e2637aeb7965348. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35b61edd-7471-4b75-ad01-4b75e2a6259d.json and https://artists.proofprofile.net/proofs/artist/35b61edd-7471-4b75-ad01-4b75e2a6259d.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 0xbba581a300f6f6612ecdf9ceda671d716f787dd0400d67f01abd36be43487038. 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/DEC829070805.
Urszula Dudziak Super Band Live At Jazz Cafe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7715e387b95c4c33cbb1de3ac0bd1532700fffb5ad3f1afb8ba420b5be11d608. 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/PLY462400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a95706978d44514344dd9edc1690c2d3802e3cdd3929db8649b7b6059e03d2a. 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/PLC062553048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8d2d061bc6d54b8470c21535a0f1741e442a3db66d373413aa42878c904b38. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/PLC062553049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387fb096a061291ba032e20c56edbddfe26f1610540b5a97b523942c7efca1ce. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/PL0981500001.
Nie wszystko jest zawsze proste (feat. Micha? Urbaniak & Mika Urbaniak)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e361b33d1082e8d2caba77a943614f33e374fc499b28e3008cfd5fe029fba3. 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/PLA551400693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ecb0471c2aa38b0845592c1d19a8d6cae9667e4be01f62b390e4df4ff3e1f1. 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/PLA391592002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757d6417df73be6e330e788a6b7c139b6259a00cba7d618cf7aef4b8509557bb. 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/PL41D1900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ecb0471c2aa38b0845592c1d19a8d6cae9667e4be01f62b390e4df4ff3e1f1. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/PLA391592002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1e69088e01342459ed3c3bc1110bbe18d77683a840c33511a7f5cd37ed15e5. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/PLC592000111.