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 0xd56e06c961fc6aa41c763c21ba8aa11bc164dbc32f031506094e8d213652806b. 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/cbf7ca9a-e487-4991-bf2a-53234cfa5149.json and https://artists.proofprofile.net/proofs/artist/cbf7ca9a-e487-4991-bf2a-53234cfa5149.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 0x09c3682cf751d624e9ef6b9018b1287e5671ac3ebd1d600562ae491dbd20f72a. 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/FR10S2438594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aacf56e7aba0f89ff1b6fdd9298805b8c250a6950b16bb1822dea7d83d96bdf. 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/QM6P42437184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86472d237ca6e0d12ccac0398fe9c413259d4233ddfdfc406a58ef85f1735580. 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/USA2P2314743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549928baa30df083bde3806f9dabc65f6aa2c2b49275756f9e03459338735bcc. 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/QM6P42415350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b5c84a98bcc36d519a723cf0574a6f4aa1c5bf1d630748ce7385a9148f0615. 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/GBLFP2485278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ce830675472e2ac116e22cf18142cc8fb0d6a595cd5dca126e7b65a4416718. 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/UKJ8H2302124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e9f00c01bb29663370a3ee694043146ad97ff02b5a8cc07885f409610dd241. 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/UKJ8H2207522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09749c368bd267977da91d290332577f3450b7295389e9ef71b531f76275f4f. 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/INJ442100119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df5e6ca9559e3f9100242200d9e39c77d61b85c9ed8293349909f1550f69f0b. 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/INS182301739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ce830675472e2ac116e22cf18142cc8fb0d6a595cd5dca126e7b65a4416718. 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/UKJ8H2302124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c49226ed699bfbb78ba4ef18ef8813564ee4c4128d0ad6431da591eca22983. 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/DGA082265072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a94626ad6f37b422b2df68ab8d68a7ae292a0f6e3c2086e5d21578dc39f9ff8. 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/INS182401273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c04be4a85e372dc3d8f338689420a991205413cdaf36f1e5968729becde03e. 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/INC622300517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fc361c1320de3ab44ddac6d893f06127318feb72850154905b6ac2a37bdf80. 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/FRX202445380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0be6a363ed40ec64d68e02bd045a982ff4d35e860c422a596e589f32f10f771. 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/DGA0P2376736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458e5bcc1367ae105ecd20e554314d4a5877d2407c16deeb23e022aac06541d9. 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/TCAJE2570043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ccc14aa356e8e6914e75c59a7d5784280733f7bd0ea928de6b1fb2b05a60d7. 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/FRX452105231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a79c64f24f219d5bdf9785786f071ab621a3cabb7ea7850abeeb2dc1e29816. 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/INC622220063.