Julieta Emilia Cazzuchelli (born 16 December 1993), known professionally as Cazzu, is an Argentine rapper, singer, poet and writer. Born and raised in Fraile Pintado, Jujuy, she gained popularity with
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 0x967eea3c2391e6da0c523e4778980d0ce29b37a239fe393f8c1689ebcb4b8cda. 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/98daa442-9d3f-45ea-8cc6-30d52ce34cac.json and https://artists.proofprofile.net/proofs/artist/98daa442-9d3f-45ea-8cc6-30d52ce34cac.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 0x6dbe8bc55e44472760242c529db02af7678214ca6b443b204d110f4ef70c46dd. 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/QMBZ92246572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b508d1cd7287c2f3c3b51216f1a2a351a19dc396a52f971c0532af606bd4b30. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TX2364655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b94e5f89c794be2445693f5b17de376953971d2f21d3f51393bfb6212fc914. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM9WM1900154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d98b65c2709cdb53852d60833cc4a2df46d2fa22464ab677e41450fc22b285. 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/UYA522000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b2dd2e33a61fbca708606bb2888d016b12ce337f0ae96f7f8263698a09528e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMCE32100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb671104984a87a8289d7ad18a60443d0209cb9f189b80cbafdcae44a5538380. 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/USB272100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0a568b936d24c0dd28faf6ae01bc2612f296724e51db50781fa04cbd50decf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARF102000356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41b979d8324f372e66835244cda0400cbb83a7d875b65c7f70a8571bc138c7c. 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/QM6N21906064.
LENTO (with Sean Paul & Mozart La Para feat. Cazzu)
NEON16 TAPE: THE KIDS THAT GREW UP ON REGGAETON
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60b27802fba2c3f7b95cddec3c5c3a870f0b697cd415479e262bb700a83d22b. 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/QMJMT1902564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260a261089b6944d603b5608221cbb4dc02ef57f43a45d3277b1899b433a340f. 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/ARF102000282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25e1c64bd991603406d5ade43bd2ec6b8e45a7f08947cc3ed48f46ade22370e. 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/ARF101800309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72741f28b48c067b8f2ae8b20cdb752a4d545c09feed85d11f03b5b35d19ff5. 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/ARF102100067.
Tumbando el Club (feat. C.R.O, Obiewanshot, YSY A, Cazzu, Khea, Lucho SSJ, Coqeéin Montana, Marcianos Crew & Duki) - Remix
Tumbando el Club (feat. C.R.O, Obiewanshot, YSY A, Cazzu, Khea, Lucho SSJ, Coqeéin Montana, Marcianos Crew & Duki) [Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1b75c1917f70eee78ddc3d18678726b50f1bbc5fafd42b2ed8332006dc1bf9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARF101900138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc514a6eeeb6a7f369f607d246297e151845f9d4c8989094559f9a5e8c1f0c8c3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6MZ2303846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba64bcae0d980d9a7a734200d4632b319733e95df0929795b6338b22fb3e8ca0. 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/QZBRF1897519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58a84e809ec43b7f18ec5bb6269af1d031fdbd5860f244cae7ee466a8105491. 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/QM24S1844080.