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 0x2a397671cc2632c23cbbea55fd9ea4ab4f3a59b5129d672e0ad24903ca4e1c0b. 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/607b914b-ce24-4b93-a013-6588679bfcc1.json and https://artists.proofprofile.net/proofs/artist/607b914b-ce24-4b93-a013-6588679bfcc1.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Girls Gone Crazy (feat. Snoop Dogg & Kurupt)
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 0xb4fddd3a7d786ac5a06778176568bc37960030ff3ba0ebd4454bd7a95db0e967. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZEG1800001 — a six-check JSON result.
Back on Our Shit (feat. KXNG Crooked & Horseshoe G.A.N.G.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ea00c0a4d2e01c03b9616230522588c75ccc4f56cd850ea500c114ed5ecfe4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZEG1800002 — a six-check JSON result.
Assassin's Creed (feat. Tech N9ne, Token & PASSIONATE MC)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0de0b6b667a7b1e989ad48552c344eae089f390aac1288fb73b74c88545aba. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZEG1800003 — a six-check JSON result.
King Kong (feat. DMX, Royce Da 5'9", KXNG Crooked & DJ Statik Selektah)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3518f237465bac1d55c27e2d42d16a8e6acba370944c89918b41379157ea39c6. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZEG1800004 — a six-check JSON result.
School (feat. Lupe Fiasco, Talib Kweli, Hus Kingpin & Rozewood)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf74f4cad7651979c866b1a257ce96a155749a05c2b67f0a21cb31d1ef6115ec. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZEG1800005 — a six-check JSON result.
Terminally Ill (feat. Tech N9ne, KXNG Crooked, Chino XL, Rittz & DJ Statik Selektah)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2426ad1dda3c8c7354894d80d68048876d3a9befbe6364649b134f9938833207. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZEG1800006 — a six-check JSON result.
Vendetta (feat. Ras Kass, Planet Asia, Chuck D & Bronze Nazareth)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe55c5f675f9418f1737b9c3539696b3ae4dd7ab4797d9e2f8a26ec0477cbcb. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZEG1800007 — a six-check JSON result.
Bring It Back (feat. E-40, Mod Sun & Chris Webby)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb2bf8e961f1c20dfbef5164fa685fd58ec1125a4ea00e75b69ee7cd5bff24c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZEG1800008 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52abd156b66eb8801c2e5cba100d2fba51232580deaf0150808b667d0b20bd0e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZEG1800009 — a six-check JSON result.
Loyalty (feat. Kool G Rap, Chris Rivers, Cormega, KXNG Crooked & Whispers)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6c6cafc0a4bb0b0d8d8e65f20b4e60e7682614cafe15fb3af5e82bba5579cd. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZEG1800010 — a six-check JSON result.
Lights Out (feat. Hopsin, Passionate MC & The Boy Illinois)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd74125efa19ba9d8542ed8442204df4256a7e8b6cd168bf512a17d3576b45e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZEG1800011 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43abd4ec335101ed8b0227f79dbc2ba3fef8fba81e29a15f99a93064df55de2. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZEG1800012 — a six-check JSON result.
Assassin's Creed (feat. Tech N9ne, Royce Da 5'9", Token, Chino XL, Planet Asia, PASSIONATE MC & Bronze Nazareth) (Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8e6fd224d0618f3f86f1323ec699a76f15047c079a5e022754dbf189c39bae. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZEG1800366 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6296633449b62723e7fa73c374a06dc942d419fd81c83617402a446aedd041. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM42K1865158 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d17816428c1c2302e36e963e94397ae8c3f17c81c25d5e994ff21b045bca70. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKZGC2500079 — a six-check JSON result.