Robert Józef Kubica ( ; ; born 7 December 1984) is a Polish racing and rally driver who competes in the FIA World Endurance Championship for AF Corse. Kubica competed in Formula One between and , and
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 0xacb3bf5a6d921cf7e5e0eac46e496dcf081afb8410874ae63564747a60ae7e29. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9a5ef30-9340-4e24-9653-8e2cfdcf2637.json and https://artists.proofprofile.net/proofs/artist/e9a5ef30-9340-4e24-9653-8e2cfdcf2637.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 0x62d0f39aba8b1a79993064213e7135e4dedd602de68ec1e7ce2740e9a03f5961. 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/HKI199202005.
Cavatina - Highlights From the Guitar Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2993891e6216326d6c03d8395ec7a5bbf6e0db5848ccd7cefa55e63e0eed06. 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/HKI199229203.
12 Danzas espanolas (Spanish Dances), Op. 37 (arr. for guitar): Danza Espanola No. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6e163f4cce364208f4adf72e502c9f346693071ab204bc10980af1ca701c9e. 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/HKI199229204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaeecc0a545a3219d0096876d73218417666314813c6d17b43387f0dc25a0620. 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/HKI199229208.
6 Airs from the Magic Flute, Op. 19: No. 5. Konnte jeder brave Mann (Act I)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d823313061fc7cfdfc63ecc4616dfc74433c1da8f7b42b9483618a9259b67b7. 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/HKI199229210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4ce8b778785082605c7e2ef33e477cb363cbdc56af1602b8ba32cfbaa2abd1. 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/HKI199229212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e37ab8a9d51b0448baee2e0776fd0920a1bb1c5f5a1c8bc5bbd3196ce604834. 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/HKI199229214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c09aa64d4b74ddffd807c06a2f1f198fa3a37ebab954637a643de8b57988042. 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/HKI199229218.
Souvenir de Russie, Op. 63: Fantasia, Op. 63, "Souvenir de Russie": Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f6f8195aae95c0abc22a1c2ebb80ffb9faa31cbbc2e80b3acb1bbbf25224d0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HKI199229209.
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
Cavatina & Other Classical Guitar Favourites
6 Airs from the Magic Flute, Op. 19: No. 1, Marsch der Priester
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a913560adc5986501935dd3e544a7ccbff7bf1e092bf6d205a27cb976a463d4. 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/USB8U1035593.
Guenther Steiner: Get Rich Energy or Die Tryin' Mixtape
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13daced08daaca04e6c92f76d1b64881d13bc4142856e58fdc76c99de29944dd. 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/QZHNA2070177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b74802a3c1a52b09f78b53d511e8aefa5b050ff1d477e3beb8b3ffff569dec. 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/QZHNA2070179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb1677ab71086d4014d3b578fb66de86a1ccbd628651e24df86fd7b733307ba. 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/QZHNA2070180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0080bb203870d85b3ef182692e3aa73f3d4d61a0fb54c3d157716e609469c242. 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/QZHNA2070182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896d6c898842dc6c435e4d911a686ee57e2095128b56a1114f6fc7bb63157462. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QZHNA2070178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd684e6223e00ebccc8e6c57675d42d4303156993d698759bbec29ba9b7dd5b. 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/QZFYZ2158235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3c8b7552b6eaef77b5cebfa67976df96f54b72b910028397102b36edac0922. 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/QZFYZ2158777.
Classical Moments 5: Classical Music To Dine To
Classical Moments, Vol. 5: Classical Music to Dine To