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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64dd3cdaa7fb5751923e26dbfc93d95bdb9dad1ca332b12ad2e41e2c83c68718. 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/808f496e-be21-49ab-b7bf-15ef41a6810c.json and https://artists.proofprofile.net/proofs/artist/808f496e-be21-49ab-b7bf-15ef41a6810c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb410c48a0350b4d34184cdc0d4ecf5503a4555237f74349becb83c6ab8fe32. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTAX2250898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c7b8d07fe71cb7520c7167083f965d8ee486a2065d220740afe1fc258a5e97. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:58:47Z), 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/QZFZ72304773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d628d45325c71e9e1caa024fca8ea37019aca107c7bece6815edb1b926233fe. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72352302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11116b067bddcba8cbd8c0d77100106b2b3f5ff11a7e4f495f83200ddc6e37c8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES92366639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4c63c7c1c75405f8c7c81f70558488753a09408746b7061cff6d71a6a73771. 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/QZFZ32301110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e33802e2bee1ab09142f5aed06f559e7899fdaf42b75692798d0be73c2a2ec3. 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/QZES92366640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf755391decfef22f7eaf3e8bda6ac127d3a46f68fd68e5e4fefb943b2c61515b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZES92366643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64c0271a651bf475edf3b2e1b434e102878b51deb265ec041b7aa8a7c8bcb3d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWV2362912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cf92a784fbcc104db8c03896c726a83d74c7f14669e7fbf24ee596fec5cb17. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZRP52383642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf748bef3d48d217678225051f77e6375f1fa37845f0aad0e6d2f9d3c6720278. 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/QZTAX2300509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf811acfe7872a8464f9473f73e1181e8c7dc0b4c84c5b003037d2d3a0ab1992. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTAX2300510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464e0f5a2e58c6903f7e268be2aaff30c58b92cefdba148596a42b37ec1799a9. 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/QZTAX2300512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a1d5d4e0773a8d2079542c00071a819057366cf869ed3e5dba47470aaa7d94. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZES82441133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe15b36003d34ff910fe191c7fede2d90ac5cdd43f7f3d731666300a241a34f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWQ2433411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f446d3190038c9eff25c9eaea7d54442aeea5a6bffa5b78d4d313d20717bf11. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTB92437600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf189ae78523238e266aab518c365774fa47a58ea2e627d15408c6d69bc36560d. 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/QZWFM2461897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269c6776000945be7c39c155dfd5594fa0d3d790c11495e534ce51f1ba70832e. 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/QZWFF2495446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101d714a3922276609b6119b06007dde3f70a2eb233a2dc0776105a1eab4b644. 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/QZWFM2461898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3ee504c570257640d20e5f898fbbcec58dbb8c33b21dd76553b65353f290cf. 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/QZWFM2461899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf398ad83d29fcbd10bc729776de664ad5f2134bfe47c4950550843c8df239689. 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/QZWFM2461900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f446d3190038c9eff25c9eaea7d54442aeea5a6bffa5b78d4d313d20717bf11. 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/QZTB92437600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4268f672dc06cc5591c96b21fce14f4a2b7dbbccc2b5debe2f229e031f4209. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFM2461901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbc54492a50db97bcaaf255dafdf70eda892e62f1ccd2efe89e85e5fded115c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFM2461902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef4e614f7abe29bd7958f9258b43eeb71cec50871aa58c8a6c679d761c62916. 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/QZWFM2461903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9053873605f2bb98f9d32c3e1c0134dcb0251dd337d7f4190d10e2ca747c93. 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/DKJG52401003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ef3085dba788105dc704cb6a07c28e3ade447b137619f82d98dec1182a4899. 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/QM6N22414302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9e48a4430f5e7d1b728acb6e97a84a17e2a121745cc5d23c9fa039b180844a. 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/QZDA42461506.