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 0x99942b643e0542910b2cc1bcdc87cccaacace037fede609c550fbcb014f0f1c5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16c56e5e-4c93-4c5c-a613-f7e3b2dfff7b.json and https://artists.proofprofile.net/proofs/artist/16c56e5e-4c93-4c5c-a613-f7e3b2dfff7b.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 0x28046da6815185e618888fbbcc546bb1677ed3fd4e82dd28193476d29ba20c28. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CZA540040601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092437e91270c3fef214874f88133ac3937e62963c19df9c8be6e09b4dcfa12d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/CZA540040602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa674c7000ea41a4c182f2ad0844accecbf87bc2d762d9730d000487e37c36a. 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/CZA540040605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70ce97460eecf23f18053d80b0217893aeae7f9d2d5a8b4cc831fa758520bea. 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/CZA540040607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f9c1c2bb17ca0658124d9901f082c9850db1bcb3a743b6337c1531e3fea456. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CZA540040611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09856f777fc4d6994858f33658c8f34648fe080ddd43ffe0aa2d9e176746fee. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:50:41Z), 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/CZA540040612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2250fe44a74322fa7429c2a455df18b67c8c863c87a57096769f40bc3cd22a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CZA540040614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eec6e4da68d797b9b63e7d65c1071abe406153e79990f647b0a21713260cfbb. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/CZA540040615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce55e04ed0f0d24dbca51f401af8c5a4e7c4490d0ee72efebe654707049b1b13. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:55:49Z), 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/CZA540040617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf656e24f38b15afb8cced7083b433cd0ed3aabdfbbb21176d45534e55b85ab. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:25:49Z), 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/CZA540040619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7344c93067ca432245eb280e8dcc135d4f6f33495fc89e1507316979b880b4e4. 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/CZA161441588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c99c4c1c70071054cd5bfb36272f20c5ee52af7ba9cdab9ea1b4417b63727fa. 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/CZA161441589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02eeefb61e29c5192c478de67e919d85ad6206bad81389e8af8c8806d2d2f0f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:21:02Z), 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/CZA161441593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea50e6cd34156a00651b677b5540830b49d838a2fb49d2449b8ab5bd6a5b86b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CZA161441595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036bd5880e7dfa6cf9e064d0997615bb4c462d07163967515a0737f385c3f63e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CZA161441599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5d7f217bf656d0c8a5e4bb4af01d5ea95d20a284ea00e042497909940e8cb4. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/CZA161441574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a6ab04a97ec32a6656e26193ca3011a577328ead45c7df71b3a905520e994a. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/CZA161441575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33be9ce5b8431d80d8ab614966c4171ee603eaf14276bcc5fe24ba53592bb8b3. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/CZA161441578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293c0baf4405d321e647fd319ba4da319d2eb741e5812445ffe4dce752adc2c8. 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/CZA161441579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54933db19ca298ab623c16abcfa320b71f4ad7883681999e39cfe1aa69312250. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CZA161441580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdbb63df695729ed4c6c6d7d186db10734ea268639ed29f6460f332bb42640a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CZA161441587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7ecc8a3372de26f976b520900881a24bc6e07fddb1c9093b4ec11f51544d52. 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/CZA161441562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43f8ce5f8c15beede516960d3095b786454e0a8dd523620155a6e0b50a36890. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:02:02Z), 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/CZA161441567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eac09b92c3db2a19617b8bb23bb24079d2c88ae0d8daf3bf635cb6d78cef56e. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/CZA161441568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd79531332c8a1fc187e62d1185517fb7b1711b66389edecfa800173b5e3af0f. 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/CZA161441570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923b98c0fc8ef3eb20778cd9d0ad935ce28f9b68a97d386aec5b548b73aad9b6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CZA161441571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45faea2cc69eca57cc1654fe45894c20468e885df984401f433ca1a0a78fbf2. 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/CZA239300254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ac0b4a159f736b9960cd3cb8aa4e90239bdbe1791e2e3a6bd97ab8e12c84ea. 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/CZA239300255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095cb6a7b7bef20cbe2ede7d09e521389ed79af945f16f6589d041f44a0ed910. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/CZA239300256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43667507db7b4321c4ba7304b8597c1e00187f21ba9c04d02c1e2193e88fe02. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CZA239300257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6319e5e8656cc7c2f5abbebe5f67d5336afe394fb72adb383c8f8b29cc4a7a50. 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/CZA239300259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491dc4a7ebdb2d39edc103d6bc0fba6db9c21985d4fa753092df9e6e03164638. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:41:19Z), 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/CZA239300262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0faca240b0c67571090f5e6bcbda3a3ab6204f0899b4cfb971377ec2647de3d5. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/CZA239300266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46871cd47b271bf3ef77ba71bd7a8f1f9b9f56aa4cdb44bbca34aa3990ef432f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:20:06Z), 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/CZA231204639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ba4774ed3d6f2842256340703222501f3c59eff6ed0fd521a0c10103765929. 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/CZA239800582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20ac20e60a658481353ffaa5e0aadd3be92c6a70c2942eae7deb67e7b80343c. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:45:19Z), 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/CZA239800583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd0157b170040ade3976cd0ca7b3abe44c9d645276efc5746d892d6cc76c01d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/CZA239800586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff397cb515a468ff26c037df65582c83700128c521d2cb408b5f046f46b99aa. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/CZA239800587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb285ed637daed3aa3f84ad86957b1187264cc9875685d7d6baaccbc349ba75b0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CZA239800589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0e975d4e611b8a8e018c34e040a60cf4e13f6866627789607b9e13b3213be1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CZA540040618.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0e975d4e611b8a8e018c34e040a60cf4e13f6866627789607b9e13b3213be1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CZA540040618.