Czesława Maria Gospodarek (née Cieślak; 10 June 1938 – 5 December 2011), known by her stage name Violetta Villas, was a Polish and international cabaret star, singer, actress, composer and songwriter.
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 0xb3636377a54345f9ae00d94b6adc4ebb8c1f9afb929bcc32855964c87a8f1658. 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/6affb82a-e3c1-432e-bae0-f9a6e07c9106.json and https://artists.proofprofile.net/proofs/artist/6affb82a-e3c1-432e-bae0-f9a6e07c9106.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 0x304414342ea1094155a04ab8b09e5ad82398a65ab0181e209d5c9d7dfdddc382. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:29:59Z), 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/PLA246208236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc94038116b061e99cc6d90c0e51b05bb08fb009fabfc7ceae9d204ae6efe20. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PLA246710988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30841c07b4f2504d12a97186e63c93bf666704c83c3ee195d628e3eaf9754fc8. 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/PLB170900948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2209899be12a6dbdaf6ade1e1aaaac5425db6f711458565d1e725380d20cc52b. 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/PLB170600083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9c4f75293397c9911cad490ca5e0a6e427074d50376cdce396935cb70bb146. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:29:39Z), 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/PLB170600084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ec9abeb4d41db17cb03eb7696293281221a9b96e808a4f3b06849ebf58979e. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/PLB170600087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532417b12541d2c0390f9c0f0df177892e5337fa8c1ef3bef5a61dadac43ee3e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLB170600093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb9a923f8bf40a32dd370f67b607010a968824f9694589d11b0b07eea21c6f4. 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/PLA246610306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8815ec9ffc910d355a17c8c5e7e64b1148f0348cb37e00751f02ea808ef45901. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:30:20Z), 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/PLA246308608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95b6daa264c6e6ac564c1293846d011f8a7ff2cffb5bd6a03b30125e67ac962. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/PLA246409391.
Z archiwum polskiego radia, Vol.11 (Nagrania Radiowe z lat 1960-1970)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd692f36abc49c48ebc9eb6e5ec5e39e00698e6a43dfa72fcb481be7a5143fd7c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLA390923619.
The Very Best of Violetta Villas (Bursztynowa Kolekcja)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9aadf921a24280fd7be4ab8ecfb7e94f3a6a35573a7b2483a42e1baeab65f6b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/PLB178600044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f469779b41be4b6a1d7248b1e676cd3b18928d2ae3fe79323bfc1396262e3a. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/PLA391592004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2209899be12a6dbdaf6ade1e1aaaac5425db6f711458565d1e725380d20cc52b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLB170600083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd13a2d7ef021774ece51408e0613541b0c377b9edcd14536c6d3c8b2bda5a84. 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/PLA391592310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f469779b41be4b6a1d7248b1e676cd3b18928d2ae3fe79323bfc1396262e3a. 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/PLA391592004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef6981b6180d6e1d5f93f85316795abc06777ad389fdc91d27215941cd52dcf. 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/PLA391592507.