J. Cardim is an American/Brazilian music producerJ. Cardim | Check Out New Hip Hop Artists & Upcoming Rappers | HipHop DX who has lived in Rio de Janeiro, Brazil, Cambridge, Massachusetts, and current
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 0xef6300b00c8a992c85c3028e1853d03cfa44efdb58e554414f9d493b28181b2e. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/610af541-b049-4dce-a134-602818f09cc8.json and https://artists.proofprofile.net/proofs/artist/610af541-b049-4dce-a134-602818f09cc8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
What You Sayin' (feat. Styles P., Masspike Miles, Tuge Palermo and French Montana)
Hood 2 (feat. Joe Budden, Sheek Louch, and Sha Stimuli)
Dice Music Group: In The Crowd (presented by The New Music Cartel)
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 0x4d2143baedef8f4e08aaefc75ffa117f940f64bfa9e628ba24ed8345e3c00c27. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:42:34Z), 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/QZNWS2408679.
Breathe Thru the Years (2024 Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d80dd4e849b79e09c4ca835d1bc7f2a9934a2a6daf75d7972ea3167e1b60f53. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAJF2523020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8cc95f7f0a5eb508e8ccca1040f12740584090cf2b20d86442f22dbc332dcd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHNA2536400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6f4603e1f59b1314b2fa7fa0dd980a55d8ddf8407ce73ae95b2f7fedff7c3b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZK6K2535055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00985fdfc498c0d3d0202b44a578f617fb590533a4ac52b026ce9344a1f0ae54. 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/BXFGZ2000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcea9f7d154b1b1a9ef8e6b36bad0e17a8b946108ebad419350ab2ac999b1053. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BXFGZ1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67453401c32bddaf4fe479f9b2bdf1d1f47eeec3ccb74a81b51784a872a9229. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BXFGZ1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f9ac5a9b8ecbf593818f50aae76f94f8b44079346d509214e19fd2a20b57b3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BRIXW2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b3c6eb0783d9064523227e69138ac233440f505c1f4ce484c78f8fb7f7876b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BRIXW2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e34888931eb3d50ab5ad9cbbcabe095ac860f14fb7a507efd745af25ac3d10b. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/BXFGZ1700028.
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 0x55a475994e7d6bc857a549ace96bb75329470d82210a77addf53670aa1401007. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BRIXW2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c875e67d2137b76c5b6c801696e3c29b149f72a4bf45bce3a589853c175221. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/BRIXW2100003.