Zdzisława Barbara Sośnicka (born 29 August 1945, in Kalisz) is a Polish singer who became popular in the 1970s and 1980s. She was awarded a Grand Prix at the 1988 National Festival of Polish Song in
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 0xd047d125eb46ad7f6079252e066a727aecc5700315a3040b5637950865b891f8. 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/908a9fb2-92a3-410f-9b96-6c350b5b9436.json and https://artists.proofprofile.net/proofs/artist/908a9fb2-92a3-410f-9b96-6c350b5b9436.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 0x25115fc629518c537c9d78297b91f0bae3eda8693b59cd0da66c5860982aa6d2. 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/PLA552300259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11d45959d03a06b18e6ccaa03cab59705c3d0cdca52ba1b78e1ecf1bdb378af. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/PLA241400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf659fd0ee349c76221c7992136fba70b169b714f735d4b53c4581c589f543d2a. 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/PLA241400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a46ec9de18a9e4ee076bc8ae79eb135dbcd134c3bb543915a326323eb3b323. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/PLA241400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4afd1c677c4c764ae944ff81d083893fa290daceffda0174b710890830e1b6. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/PLA241400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c32b9494cd2527ed090951e38ca6f031b5af7f279e22128297e1fce16d8714. 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/PLA391592018.
Pożegnanie z Bajką - z filmu "Akademia Pana Kleksa"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae2e13c9c81d5e1ed0d39459a0fd12ad8e174e69249c7604866c6264fce7b6d. 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/PLA140125017.
Alex Band Aleksander Maliszewski - Polskie Przeboje 80
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2a093592787c761c6502c5a3ee693ab94ee2e7b670a57e758564dfdba8a0ae. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/PLI531400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968417d5d4537be91a2b90f6c1198d0043c07de560f3ff1c8dd2bcf38a3cf52f. 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/PLB170702637.
The Very Best of Zbigniew Wodecki (Bursztynowa Kolekcja)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968417d5d4537be91a2b90f6c1198d0043c07de560f3ff1c8dd2bcf38a3cf52f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLB170702637.
Alex Band Aleksander Maliszewski - Światowe Przeboje 80
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07547b58061844606753f5c2a48a0d25e7f3cc0d03feba2bffa1c4310d4c15b. 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/PLI531400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23417e3de13a59d631f0d8a25c23e05609d7ad8208c7937ca4c09e992e09ede. 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/PLI531400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968417d5d4537be91a2b90f6c1198d0043c07de560f3ff1c8dd2bcf38a3cf52f. 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/PLB170702637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fd7d37519f400723a054bcb1b538cce7754c61e2c19a472b71e4b4f7aeef75. 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/PLB170900406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c32b9494cd2527ed090951e38ca6f031b5af7f279e22128297e1fce16d8714. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLA391592018.
Alex Pop Symphony Orchestra and Stars - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62a82754dea8d0e6060ef4888232e1db312778c5001ec8b50d05554ce8d98be. 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/PLI531400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa798f7adb723d08bbbe18d801504745ed43c84f4922cf40ddeb35bab189957. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/PLA391591704.
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