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 0x20e55e2d0b6dc2bec65d4e6732feb7bc0e946ab6fc96ac0f309ad6faac0f85e3. 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/ee030412-4f5f-4e8b-9349-b56841767622.json and https://artists.proofprofile.net/proofs/artist/ee030412-4f5f-4e8b-9349-b56841767622.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 0x71eb3110ae9251151318867f40c44cb2c12a9843ab3b136eca3a752ef2665bd8. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ARHXW2102207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80899830694edce0661de847ac783b263b5ccc1beaa2c6e71f7961c8d699808d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/ARHXW2102215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719641611e5269f81939d8d8050c0aa7092e36b9d7a4c3b62d192a41578ee689. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/ARHXW2102340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcafda0dda2c7eedf43dcea91069fa5cafd6b3c05162a805a702c0d357244660. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/ARHXW2102347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41557bfb7692cc1710ff72388cbdf39d58a0899b1855a9ac92c83221792e4fc. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/ARHXW2102342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bd4f6bb8e31e1f3666b74755e2b2043eaeb37b8330d6c6a4c4812b7626c247. 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/ARHXW2102331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71249f14bb9116056aa3a644fa8c4a785d585416c876dbd4767bae89359e0ced. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ARHXW2102338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fa1bfa3211fe49f94400aa925f4513db0dbd3515080b4ff45640190fe4d008. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ARHXW2102349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48b864a6575206e52035e0978acce9f1a49143e15e3a8670df6bddc980eac43. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/ARHXW2102351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6d40ea8c1312c02edd74567bc377dab13b1d579c83d46ab8e6a68516ece9e7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ARHXW2102341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d49597f4365c7e94236be458ac84aae77cc24ba376aac5f0429631a42bced2. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ARHXW2102343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479991046cd7e2104f3665bf63a55ea724431605dafd677196c5512a6d2f2b7d. 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/ARHXW2102226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021ea4cedf686f00e9eedb648097ff8c71d236f648c35050ce3be232c0ef584c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ARHXW2102223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f229ba6109fd8f3bc373905045c24d07f7084169c9bec3977b87dd9f1a5686. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ARHXW2102229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda17729b73076e06b8e0ebe72b036739c56d84eee660c8c735e1157036e3a9a6. 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/ARHXW2102320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bce2e864a2971b89a685fec6e8e0b34e344fcb327f8423fe3ca9c9d9736e12. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ARHXW2102326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba14df568abd094ac6f6afda04b18b5aa2ef0a7bc385f78b03821192c4518687. 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/ARHXW2102322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b61137caece0f9df121ad590e53b82665eac93ee9342b72a02efd4a9ac26eda. 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/ARHXW2102323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7ba77759e40f438d859054449728d5f7b10303ebf7f604fb8a847d4907a526. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ARHXW2102313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d29cca5ef17f7f63327f22d71bcae7d109a07cdcd8cee14c0148ca8a0f7dd02. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ARHXW2102315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b69d7e7e720355bfe70822ec6591f1af1d7060e07e91744cd7b2cdc48f74de. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/ARHXW2102317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2c957d20cddf9637416652c6c4308d3ba4d95f404c31f512b8612f0689a1ee. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/ARHXW2102312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cb59d2d793d24ffc4607b66745b45be975be1abd33ba6769e7404a9b926326. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/ARHXW2102306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a7ef76eb929b95859e4db7776c711433ee14960c0dd3353b4bcce00731b77e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ARHXW2102304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d0b8121904fde918cf955473811bf7ca76f5e5764ecd4861a379d41f8205a2. 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/ARHXW2102310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d65d593e33dfb657f7d0b30ac3911374f6077f38f0637c66963d0e9904a8cc. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ARHXW2102305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f277ef486450c255b62d631de1dc0d81afca9653c28c8a34ce81e377d8c12f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/ARHXW2102299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf529744af0c8e436414eaad3ddc374c66044894a379bdeed2ba8c4f5d10b95. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/ARHXW2102300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796061f5ee0dc6597484f62b97fc61c096525c406e8f2abdd5ab7833e95cb728. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ARHXW2102291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbcb4f9152d9a313509e1367b233356a1fb4cce11ddb15139bd8e1123c09288. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/ARHXW2102293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9870d1da58e83eb5c2226f5929f09eec86335387bc99a6e408af955893692eec. 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/ARHXW2102294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bda557d70a2f9cc0cd441945bea7dc01c8f1925aafe127588bfb49128ba29c0. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/ARHXW2102283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36357168ceb631e9775753f897e03363d5fc563312335002c3169365b99c023. 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/ARHXW2102286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd84b3b4fb86dc8d4daec062c94eb43d0c6114c40e9d4e5ca380d0134cac12be. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ARHXW2102285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa1b5750884f276eeab0dfb54a62f383128d7425c8ab70a26472ebc9e5b4d69. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM6P42486338.