Sosnowski (feminine: Sosnowska; plural: Sosnowscy) is a Polish surname. It is related to the following surnames in other languages: Language Masculine Feminine Polish Sosnowski Sosnowska Belarusi
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 0x318cf18bd97b683b2eff3b7859045232cd9896aa896c3ce103dc18ccfeae0a6a. 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/1d6b3293-9537-4d30-920c-bb2a81d759e7.json and https://artists.proofprofile.net/proofs/artist/1d6b3293-9537-4d30-920c-bb2a81d759e7.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 0x3ad2095f37d6341bb2f48e2794c6f255222bcc0a9265b21a5a96babb247d7b2d. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/PL90A1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2273a99a8f7806c0904ae2ca1edf7bd037e90b2302513633c45950f90e7c17c9. 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/PLB822000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f3957eb34ce952fc7691a09f3a8bf438a2904818e7fcf723dbe2cc3e2d91b7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:22:12Z), 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/PLB822000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0a176216b75e618cfc9c9c72ad753c127de3095134cb75749066a05f269dc8. 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/PLB822000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e204cf5d0af2eb01d8686a4828287e300c4d6e6b5b4f67ccb2abb1f6108bff. 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/PLB822000051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4e20410b0d0d888389e7c9e2829b4150f1b0995ecb77691d97a220f4142811. 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/PLB822000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa893bb4cf3580ce45d83cafba560046ffe8a6f777a8edf03383d30c64f7bace1. 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/PLB822000058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac930cc3ec6defb42d68bd1fe41aa994c36fd9f5e85195e5c081e0cd7396341. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:57:53Z), 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/PLB822000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0a176216b75e618cfc9c9c72ad753c127de3095134cb75749066a05f269dc8. 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/PLB822000050.