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 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 0x0ca5ef280ac0433f5db3b9e2ebaf99d1bf7e18661790f42dfbf5a3004bcdcaf2. 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/8a38fc27-c1e2-4158-9d5f-9183dbe0a488.json and https://artists.proofprofile.net/proofs/artist/8a38fc27-c1e2-4158-9d5f-9183dbe0a488.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 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 0xef625d8f1d7b86276294fa27fe0d572238bbaadd29324fe3c6a89e754d052a3b. 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/USJKM0807206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47d9183f5d1ea06b3c774f77c7a1a57a22e7034d5502c5016ef171f99954e30. 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/USJKM0807212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928fdec3a5211626c589e235656127684ea26af9e18a5db1867af92dafbac164. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/USJKM0912908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f4ddd6c941906d38b6fd7fd7e042c1e4a33e753292f56a98e2c7f7ae06e0cd. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/USJKM0912910.
Killafornia (feat. Lighter Shade of Brown & Kid Frost)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0ac7484bebbb3e8d75d6fc4f66f7720ea006c196df1da8c890a9bfff435305. 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/USASN1103183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108e2bb5eb7541163aab95ad999a892c417f270c5f97ae6da354d26ca9ae6b25. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:51:22Z), 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/USA2P1220383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb006bb3db36d0392238607ed3b77ae3a33d89b092e833130128fad9cfcc5deab. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USA2P1220384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458c295db320c048b712982b8f149fd3f0f9b520bbc7284bccde4dfe7cdac347. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USA2P1220385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9270bc386afe399d2b618af233e642c39c2949deb023abb16050fbf4a24967. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USA2P1220388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d732af450af33c2546b4bd000188827a46c6500b5e992c9302b5f0fd741839. 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/USA2P1220391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df7929d8fa9cc14c8b4e67d7cb14a604444b6238770fb05173ae282114abc92. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USA2P1220396.
You Aint 2pac (Loyal to the Game) - Single
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf34b96196b277bdf8fc7c365efd2aec568348bc9f937c365ed7fd0ad5f49675. 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/USASN1302774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc34faf13409abebf06d15605c339c72548323b17c7c18a1822b29cff7530b8. 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/USASN1302777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae06350a02fb8ec7c637a454061cca0fde6e2a374bb890bbb7a09b8495030b61. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USASN1302785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa226b917cbb80368de0b9bf995f35e5b5625da5acc6daeaf43037fd5a76ac57. 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/USASN1302789.
The Reintroduction: Loyal to the Game (feat. Fingadelic) [Loyal To The Game]
California (feat. King Lilg & Samantha) - Single
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bef8115bcea04f3c957070273f801bf4f8b4ca0561ac41fdf4d65eeb8112e5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ8251721116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9848ac558f7b32e4db79aa34fd2814b5f6b6abeaf5a67ea20e424b1812ee6760. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZ8251721118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bbda6872ad2fd9442083d5b0e0e95473ba2d626961139a3f9ea82e77d3b701. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCADZ1832134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcac784cb8db61d321724180ba316e4cb438d263579bdb2df65c6dc2f0879616. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCAEJ1980929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8379e4c3124ff6e62e5c2457ed7218a09d918a01a626121b6a5dfb0a5c0f3d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAFB2077906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f218ecf8de294b8d0331c30885e83f032fbd767f30d859e5e62ba955e81c850. 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/QZES82236457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78741fd2d663fcbbdc31e8e9d672fc5bc18ae7a0699417bbc8a8646d8db4aea3. 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/QZNWX2304131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31ac44696209e5fdb34426e0b171d6c0c85547cd4a78eb530f1788f4780e2c9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTBE2353551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c19590c9750cad84e5baec6d1d0c98ffaa5b27c37261392786147a1221435c. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAIN2459816.