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 0xa28b2e8eb8f7fc73a6afc85445a59262a4c5304a095740bf8f0f5beab72261c2. 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/f3d9cae5-8c0b-4550-be86-e9265d841cf0.json and https://artists.proofprofile.net/proofs/artist/f3d9cae5-8c0b-4550-be86-e9265d841cf0.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 0x19bc138e84aa28409ef705a6e549ca69141ba708ae3f781ab36f87f92d373c26. 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/TCAIS2478735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96119cf6b36ab23c6131ef137f679f7cf000683ada0b43600a1c27a922c007dc. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAIQ2478739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0a7c584c71a2799aa1b96c5fe10ce5633095a1fe5e87aa3c2676e87e06b10d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAIR2478745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f411bebc8eb8b15e13ec82c1b9af3561c805bfb67ec000ae7630d323e246679. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:56:19Z), 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/TCAIQ2478746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6456ca543355bbab0e90d1ce2e64e9662dfb41b5d5ce08afb50e3a2362273e9. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:49:32Z), 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/TCAIQ2478748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32319f5e0f184a8c1af492d305808ecbc6c5be6e2ac25784ae3e6bc4461f5914. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:44:00Z), 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/TCAIR2478751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7972a33bc17bccfacb33b68a0080e98bdb46ee1a3408cdafe687af0c336e4f0d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:52:09Z), 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/TCAIR2478752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c1692e533b3c0965de1bcbcaa852c770647c0d1cb6285a837ef6e79ffec0dc. 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/TCAJD2400534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdceb48b1785d8494689cbd22062ab55cfcdd7b6263f7a15f2ee0e2a23261ec7d. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAJD2400535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583fde2c77f00a94fccbfa094ae96bcf395eb3daf4822a80c672a72a456e65ef. 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/TCAJD2400539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acd51c7ece92533d2ca1413d061150b920ec326c2a7f253f178dd3ba6e6760f. 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/TCAJD2400544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3cc98812e6682c5c2380b389722fe971b422188df4bdf98a8ddf4dc64efbbf. 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/TCAJD2400545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc3202519b1c375a78cf44ef89170006fcbda20a4b7e22de4f55816f9fd71c4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:41:55Z), 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/TCAJD2400550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65097a4cd926a23f11ff496d031efb259c31ba6c744d176c7957c3366f173545. 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/TCAJD2400555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2935dc2e92bad2624e76ecf49a9d5f8d4ac0eead1c654cfc4b20effc2a6cda3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:35:55Z), 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/TCAJD2400558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe253dd957491de251c0c4eee15d0d3636a3cf09d6440657feda4c8603c5adc77. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/TCAJE2422501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a61fa8b09eb91241690eab8aa15258d0a9195a3674f6422e1aa2d3c0ca84c73. 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/TCAJD2422502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4d371cf62ed24b4c99ade6fa87284926631706aa4aefdd17a42e28e403cd72. 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/TCAJE2422504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fb0b29e16edfe815691aac931d1b7ec2fad6ce265b3cb862b1f72d26ce03e6. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAJD2422506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfc6c932f91aa3b87f84330eb8e0d933661d1dd8b6378803eef2318ac5ef60c. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCAJD2422507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7604c5498a5caa212dfd8fdec8e60e7fecb7367930a780ecfd8796d3883238. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAJD2422513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d03eee1f7cbd11b932d280550f5f66779c9d52bac8e640cd13122d241e8f19. 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/TCAJD2422515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3220af2c4bac42da56d9b318c8da7062e5c4e45f5b7268160ac04a9c3bfb7bb9. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/TCAJD2422520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d721fd0362247ac5de49f852e1dfb777bcb831d8a07a4bd6b7b2e2d4f566f95. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJG2531858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0749d431e0b20954949c2ca9be1a7fc4e0b5e9220cc75b4e6bc898fceaa72232. 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/TCAJG2531862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8731bc64714ab033ad3c2aabd50e3e1f0851cce12f32b4496af03b256f0224. 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/TCAJG2531866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417c26daaa7cc5c0bcdc10de2a6b0eaf66b843e0ab5ad295440597396e3c13e7. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCAJG2531870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8807c1c4497171fd18bb5785f424eafdd7ecf324a7b2168403902cd32f0a586c. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/TCAJG2531872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83c854fc160a9ed56651a02e077e5b9957b49eff7a888b9f7270e2e3cc4b794. 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/TCAJG2531876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998940d6417b22c066691f49b612dab3de567d80544c7c468a6840e382466a90. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAJG2531877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70b7de5d7dacee6011fffea24ecd97b0882fd2d304fcc9359b257dbd76e9469. 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/TCAJG2531880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca929666680b76b343e98c0d04bce916f77625d08458a4e9ca30a5925fb16ac. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAJK2576613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde477d54567f5f8f05cd655b6aa9ad4a3a85be906c358c451e0fb2930173e0ea. 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/TCAJJ2576617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d13480976d30a4443174e5e095e208cddd6627337dfeedab28900afbc63d631. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/TCAJJ2576621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b43391a63d25a1e69ca5e7c2ee1e3e821ff03db9161378ecd99fd2793fa11e. 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/TCAJJ2576624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c0e9b69ab76e601e177ca8baa064f1f650c27ba79848a9e173e60451db7dfe. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCAJJ2576625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1467a26dcbd37dbfecd6ab87b0597d4888c926d6083b576308dab2b94a4bfbd5. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCAJJ2576628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef00f437bacab821b198689a01857dc471974c9d71f5f9304fe325ce30f5ff5. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:02:16Z), 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/TCAJJ2576631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb906a2f03649b89302acca920186afde2f5c1ab41500ac8fd0c70ffa4121f3. 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/TCAJJ2576634.