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 0x22bebc0ceb080cd6fcebcce7ad3f635dc36b008ffa5b2ef8d85e7c4beef0ddb5. 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/dff31697-e24b-4d44-b88b-824237553be4.json and https://artists.proofprofile.net/proofs/artist/dff31697-e24b-4d44-b88b-824237553be4.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 0x1df3642e54b6ef72849c4e7b06f89421a230f111caab43cddc2d072a630fbb16. 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/QM24S2303568.
Dragostea din Tei (Besomorph & It's Different Remix)
Dragostea Din Tei - Besomorph & It's Different Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480a5244da33a5372b6ae866d6ca4902ec2696ccae4b84fd1a86a101ca033451. 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/ROCMA2413284.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZEG1800003.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZEG1800004.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZEG1800006.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZEG1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4eccff039498c361377ba0763c38a9420ede341efc8330201e261c01cb0ad0. 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/NLT2H2400600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5001979496018384ffbeaee39f9db0d838e97938be48ee6314d02e44b66f70e8. 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/NLT2H2400536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9add86bbbdd55c0f865c81e58eadbcffbf4156880609be3769e65fa5d3a54b7. 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/GX8LE2470856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72614821bddc3f2a4357a2cf2b29b01f2041e673a1f458460b22a65c6d5be2c6. 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/CA5KR2444499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1548a18b8ac63322b1fcf14ab4299b8e8f30dfab65e1ed6775d30fdfc7f7678b. 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/NLT2H2400212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbade1e71fadb784e5e53dfa63d3aa9ed588f1a62931fdf7b4eebca7d3ffc13. 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/GBKQU2414220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39094789d5424323b855b260abced4a7e2c7483dab8c95f119c40fb8974b5254. 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/GX89G2447733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868b461a24809ebb4c7e91e1f295ab15beeee5051d2f5d8394566b4d46ac83c8. 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/NLT2H2301087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fe703f3321e88abe8092b75106e27e3c09e2dbe21be8fb28321216a7512976. 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/GXBDS2331714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f45ce5afcc90c57145fad0064cc581d08615ba236437a72dab2297e9ec35172. 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/CA5KR2336087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f135980e024dd5286fdcc43e5731d43678aee35a7f4818dd95f1fae8833faf4. 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/TCAFE2041861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f2ead203f3acbc1efd53c3c89ccb2f8b612d795d83012af0d804eaadd910f1. 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/GX89G2499716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc700d3b7a6e474ee4a0c2ea0ff6a5864d7cdfd408d152f57e7cd2e11e778a1b5. 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/TCACT1696009.