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 0x184ad61c483796607e8301cd664aa56f84323efdf553b30a9ffcbab7b6f811cc. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d678c2d-c3c5-4540-b506-baa2f9abedec.json and https://artists.proofprofile.net/proofs/artist/9d678c2d-c3c5-4540-b506-baa2f9abedec.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 0x09e34685617b0a39e780a7be267fc0cd3cf038cccfd95ef03bd83c8b0b042a87. 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/US38L1101618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578e8d6b21b0f0d3246a578174b45fd361960a2eb5249d61c722117068f5d697. 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/US38L1101619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ca87ad1c714152a51ee0ae06e568ebb929cfa38658dce6ef5acc0836f0cc35. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US38L1101620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b368c60b217364d12e47b5eb3e6d8f22afba4483f6a26e012dcd60a53ebc75. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38L1101621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f23d0ceb8c413abd5791e08e555606f75348c7b7098a77ec3dc09b24ba8abd5. 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/US38L1101622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c9b9f16c6830a07159e5ba8d20656710c3dfd5ba03df0cbbcfddcf81c7ee58. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/US38L1101623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bfcd83c1fd2e00f32b4d185dfd7132e066377867d8c611e5666ccf4dbb4394. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/US38L1101624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1c012e032beb944edd7f472d49060b4d4539ec5f378895cbec32b8dd99a999. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/US38L1101625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327cfc0a4178975492ab58a9e0f7d361da4838d42b052dddea6f5207bd0a101d. 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/US38L1101626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c89b28412abc27d25b819a9b8282747a21649b218baec39c7016df076cccc5. 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/US38L1101627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cdf83673ba99bf3d8f6c35224f4092d46b67caf13155886dbb84c30aadcfc2. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/US38L1101628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165d3023479a09a600c4ba7f65b7da843704b42d164b8df61482d22a440885bc. 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/US38L1101629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51cf74893b7b6b70ab8ac849b872d205e38d0ffffcdb38c2d465bd60ab55bc5. 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/US38L1101630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4735f81cb399f889505af12bc940ea322135494be3ebc8a54b030a607a1b62d. 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/US38L1101631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35716b9cc0394f4b8f437c585063ff7623a5e5c0f57b5b10c96ff67f97ca454. 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/US38L1101632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39fddb191a6d1efc5dd2f1f08e46c746931df0f9ed58aecf18c21433328592b. 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/US38L1101633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3007f8391c4d634a06a4ba29e9b3351f57268d03fe3a94f18ccc46a4bb5668b. 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/US38L1101634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75d4b9523d0a98e1fc3d56bd20e71422b077035e9af3dddde780feac8395855. 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/US38L1101635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc0988f50abfc569d50e733e19a60b8b5d6e58003f198d41fb8742a8c75256f. 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/US38L1101636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ae7fc33de9f389e8858265f8e38b42e6f81ac9c5fdcd466111af8118479f51. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/US38L1101637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb2c99b3d48bba7461c8f7be408fdf6518d13e5961be5f36196080cba00242d. 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/US38L1101638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffdeadbb029d2f5efb233c543584d6cd82f1d5c0c2cc39c01b0329002a070c7. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/US38L1101639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9fffe747a9ea6cdc066323c1e6d2dd1fb661dd3208d5773a816bdce9b2e8c6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38L1101640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d20f0ccaf3ed0ecc16e345fef34a38b66deebbc3063fb2542edbf4b0f9c94fd. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38L1101641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4884d90b68da3c92c5b64e2713cd51a8b7569ab497bb19f45f5f09e3fdbe0668. 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/USUYG1153145.