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 0xb3b73ad22ad39d5947c7442bbf06a1cf9d298d1f6eb05f383c4e69742614a90a. 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/b84154b8-c52f-4bb8-939c-331f71610e24.json and https://artists.proofprofile.net/proofs/artist/b84154b8-c52f-4bb8-939c-331f71610e24.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 0x5b9541c180bad8e827388b49000b96e6dcd1e6eb641f54a8d722ecfe819fd61c. 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/BX9L12100164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d24ee08037f73d8bf98006b1c02165c0136df50e0473e70d7146c57baa755d. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/BCNWM2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470ff2694beaab1d8809aca3e062c98019fbaff4c5bbeb6a1a8eaacf24f7e1f4. 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/BX9L12200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17dab1f329508833aa60b0634545620eb407f6ea4a4fc9e3fe2144ac29944a72. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BCNWM2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef998bf9c8bb98f208e8029130c121c6544e07cd43dea69c25f311fd7dd0d7c8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BCNWM2100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2e772a3f431c7f565f0c6997a974517b0234842035d0b0ca12e1a1bddb9a8c. 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/QZTVM2213424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde11eb3caad3ed1994939750c2f97876e022461130d00056e1cafc1838408a80. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZGLS2385088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006c48807e51b7db43f5277300e40d99ef40baaecefb695fda37353830ab486f. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/BC7NY2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8688b85ef752e3e97491d22c5f51da9f6b63eb442312ac3527ecc94f0af864. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/BC7NY2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e51b67c9fe954fb2e775539892f9c082c694c3599eb5e8da5e5c4bc0b22168c. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BCNWM2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383301962d6fcdaa4b9c24af9a63818d00a9e413ca0f4f6f66a3b0a7bbc8286d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BC9C12400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8509044b16a3d145b4a4f5eefb110c889d5c9ad15e4141d0b2c875e708f7d009. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNJX2414280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef6b9c8b2b6e12913f1f53928c53259e3d5aac4c2855a2670a42b5f1b26dfc7. 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/QZWDD2481136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb694b9934dc5d2aa503e2215115cd399499380b233e784a42d0df899626550f4. 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/BKOUP2400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d870b5c1e8e8d57f003af74bd47260fe10f71dcbb7ba26440a7489389adf3cb. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCNWM2400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512fad942555bd1f55f1953d07c3d1812762672ca80e56656a50c44c9451f609. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/BRSVB2401135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7514df8f36d447a9c5897a1236367f2815a99f56a8b6117ff7633b1f375e0140. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRSVB2401136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeedc457f16f02c8eeceac95daa554df3d3178900e7502ab33c7f8c243fd405e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BRSVB2401137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5b208141c8656cc6027176f8751c75395f321bfad41ef2ff97b173c0e6d7e9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRSVB2401141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe87c770778453df49855e37421193bea1caf11668f446de5bb7f94b7950ed47. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GXBAV2130549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd0076d81200ea47008aed26dd825ab6973ce7bc114cc0ac93a84c9848c98cf. 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/BX9L12100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c0578e7e965c237b30d52f2bbde490c95c0ad163951faeb901b8816a89b4bd. 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/QZMZ92221291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dec5237620e8759288167f6726ed5edf29201f2c9d8738994d9fb2e1fe5bfb. 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/QZMZ92344916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39f57b3f21f4172a9482615d223d9d6c913c74cb36977cfa511fd67e20f47a5. 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/QZMZ92344926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199b8aa0a01cf5396908dc46e580be21be6eeab0249547d56a1c7dfa81a74481. 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/QZMZ92344929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4131e08b5f6f2906abc0c72f2a00aec982d682c50c22922eb8e54c738d198328. 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/QZTV32414462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bd8463695ee5060288f9b480da836d29342761f0da86dac9f74635a1a9337a. 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/QZTVM2438069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c9fa64a8bdbc3da0eff560ce6816a2d925b3b65de071f2f1ab2f89f8a475b5. 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/QZNJY2487711.