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 0x02d2917cc9e16d79b8a54594c9967fe3cc7ff3f6370e3caa494e8f560aaf1457. 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/cca2adfa-b1bc-4892-9dc2-d1892713f549.json and https://artists.proofprofile.net/proofs/artist/cca2adfa-b1bc-4892-9dc2-d1892713f549.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 0xdf761b039cd5f25853ca66e2cc2139255813b89090dba28d2cc48afc0145c8e4. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/SEYOK1416746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02e664a5a19b8a12853fe193f02b33a92ec8e7f5d3c127c13b27c6f2f940f0d. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/SEYOK1521551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bb6c04b8da801f31b96fd9c9cb7b58c7c9b1c3be7a95fa66d15fc16bd6c987. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/SEYOK1544795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25e9687e1a0864230bfc9290c3ba83a607b148bf3a42b917aeeeba9aa3a5b5d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/SEYOK1606580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5607cb7089d1510ffa22df72a8724991d7ade6b22c487fe3c36de86a29211e. 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/SEYOK1625549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393784b82ca1443b810103e4bd8c3dfa73a8e91d60e53b5603b9fa8ab0c42214. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SEYOK1647741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5655c3fade4baabda1d1ddd33454eb0eabc98fadfa019c88a29c4fda21fbdf. 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/SEYOK1652598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44da78f6a479e338e40dd61fdbea70f1b4673069b49d10727ed5178839ae250. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/SEYOK1657143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b763dc4be2ca0997aae9d27bdcc8d1c241e9193d6d67d69e755b81f0bb9d0b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/SEYOK1663859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf425aefe46ac4908c4d58b036498d2fed576f065259b245a687561fcccccf52. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/SEYOK1673843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87b8ffbac3fc1da954c235980bbf50ed1ad0563230540c8b8d2626ea30acd24. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/SEYOK1714543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b93461f455dfefc4211616f3eb0d7c80400b09a6184a9d8f3c54a3cf897b009. 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/SEYOK1719449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffe1e4fa48bd52ac6bdfb71f8e1753f281c9c89505df6a352e02fc34f8e17c9. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/SEYOK1721406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8130215c3920231cd2fff5e90950e0d87e23c106d59778e2b2e696ef0a004450. 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/SEYOK1732546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644e3b74146f7d313e6f72e625c336f338f1ebf5a7bf9fa2976268f19c6bc98e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SEYOK1736299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55772410052cb92027fb8bc408e91e4ae5842f3bc4a96c5558155c3f2b0c37cd. 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/SEYOK1752883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f652ea193d223461a582e052a1c0d8ff150b35c4949fd70a23daa57e87218c. 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/SE3GO1705601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8be0f3e3a71b78b04423bfc11de2cea92b86e4c493a2bd589ad5fa608b495f7. 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/SE3GO1801001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf10e93396859fa559113525b3797c4d701e9e3761883c7c34695205028f8e0. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/SE3GO1802501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabe097feef3eecddb1aa133b7c75f84e42e1bde5cb456daa989fe7fe8fb48ec. 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/SE3GO1804401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d953b7b1399bbf397612a7a74fc2cb540976bd74a4782dab677dee78c59122. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/SE3GO1806501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b9db13f32c00e6a61cd6a55b6dd8f935c824e1576a5c0288eacbf1f65ded29. 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/SEYOK1950166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b9db13f32c00e6a61cd6a55b6dd8f935c824e1576a5c0288eacbf1f65ded29. 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/SEYOK1950166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efa029e288e37ff8aae25317f2e59584205a60d857d7ecc2dec729ecc443e13. 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/SEYOK2001881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c136583523304cf827c0a1e6bff9b5c7dc47f1273ebc21b0574252efd47c75. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/SEYOK2027439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539ba005386850338dc41459dcfface9d794c9f247b2e21ffcf207fd23b81f79. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SEYOK2049466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59389f5f9bf91810d659e1c477185a26bd7190a97f5dd07f56923cf99b01d7d0. 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/SE3GO2104701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a4c970fb3f21f772cc41b849ed49e016bd24e63d175642fa5cb08b8c0aa36f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/SE3GO2118801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11af904629935cf27038d3e06fe214484cced4f179c89cbd8e2bedaaed152f4b. 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/SEYOK2214255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252226ab0fef92a4a4cc7fa672c80bf540d6fe35cab5e8b22aa25db8dfe3b581. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE5BU2401610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc117144326f3abee2916a9600658f6c3bff8d985332528119e993d1839cf5831. 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/SEYOK2124733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ae36bc2f03619c5a89533ab3121e0e39613e07d1025696c4411b6428f0a731. 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/USA2P2462178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aba969a104889c107a928dc66e04d62f907412b0c29f15d6704391a68a687f0. 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/SEWEE1904201.