Johnny Prez (or J Prez as he often calls himself) (Born December 4, 1978) is a reggaetón music artist from Las Piedras, Puerto Rico. Career He used to belong to the group "Kid Power Posse" and the du
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 0xc4aa1a7eb3c6a92eb574dd09848c9a9988d83affd20c95e394d7d56a8a49a982. 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/cf396447-5104-4cd7-9b8b-5a5750f48e40.json and https://artists.proofprofile.net/proofs/artist/cf396447-5104-4cd7-9b8b-5a5750f48e40.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 0x9a58dda8cd3d20c6a5b230cbe02fb515540a95448b22cbc115899f5935ccdfff. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/FR6V80961178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a04c4910c29d4bf4d3a6fc4fa5c3649e7286ad6d7dc5648987eab293f6f4e0. 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/FR6V80961179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82e045de9fdd093d1a1542e28153bbfdb4fa02163a638fbb37fb9b83d170a9c. 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/FR6V80961180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd52f2e0d8825faebc279c342ce7e879812303484f6b885b21aab4a099463274. 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/FR6V80961181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2713a329e51e0999a48f1e26c8bbf4c9fba48b0f3ac2d10ab2b70577095057c1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR6V80961182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94aab699aa5cf58e2d8853c395b6f9d23a58ed16c2452d84641b42662dccdc5f. 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/FR6V80961183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9d7fd967bac96c40887c611b2d10082e89a155fc429a7039e40482c4e5407d. 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/FR6V80961184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fea2ddcdba9fd6b4786f59660d744d0a8c398a0976ef45054cafe7e1d94ed9. 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/FR6V80961185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc80221ff842974613edba7efd0bccceb14e64744420fbe569656604529cfad5. 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/FR6V80961186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27085d34e7d0d4be9d65ca26cd92efb339cdca2b5706e2a37bb59cb84b84c837. 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/FR6V80961187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019e3ae1bb86bf79c6997faefc6258c625baad68387c061b4af29a81f90be738. 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/FR6V80961188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f45a60efccf316ac3a914a07314ea7121ba8af8dd90b25384523346b7e43df1. 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/FR6V80961189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a771733a4be6d450dd5c622502d52d400aee127834506baa4658c1ec98538e4. 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/FR6V80961191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ccf2b3cb20807c742411adb22633acbb9b9ddf3f41070c2d7a7a46981e22b8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR6V80961192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b69ef47b1e0acc2208bd48e7d9dba9bb0552e7b58a6c068e560401fd6c2cf38. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:03:47Z), 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/FR6V80961190.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c3d0dbbe2f093f1a562379ada0d6855ef0579701de3358ad186ede72c5f102. 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/FR6V80960040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f88ec4b653b96948c40282251be6c69759208bf5b906043d248b416c8c37161. 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/FR6V80960025.