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 0x1d15c35cd56d8e0f0f6eec5ec059feda1dcd6199abf774cc17b3c77d0877a690. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/980927a0-5164-422e-9ced-96ef5f453e06.json and https://artists.proofprofile.net/proofs/artist/980927a0-5164-422e-9ced-96ef5f453e06.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 0x4eb047d3ddc6734f2829c45c3571af1edb89401d338130108a24a7d78fd1fd98. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:59:44Z), 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/QZ5FN2549056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74e8d293f18d24182d62a938db194dac64dd47240043f223bbbce86f238e364. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:21:10Z), 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/QZ5FN2549130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4084bc4721f6f1123f562c2e5834c2c8e4ca2618b787e5b8588afa9f5015d4cc. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZ5FN2549138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52410fb35ed74e915dcd72af9ff17bb2a6917579646d7ba9fa2875c2a27ef8a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:00:24Z), 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/QZ5FN2555098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe579fc4420f44ec0346e98a3a43d5e58ea0372b89da5604d3867184390ff5861. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZ5FN2555120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124bd1e7c3b7ebdfa28b62fe4e3140adaed4fb024ee13f8bc3dd717a92abc9f8. 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/USLZJ2508550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae704b5c7db5819638aeb1c6705c3b240a5ed217f649cc07bda68b68a5c9a20. 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/GBRKQ2549449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c118f3ee036719f37b808acb0572cc75e6c19078a1a3b48a11e3542663bab3. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBRKQ2549452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e44c229df98d254ec4676662272cb6bca706d2b50c1249e4f1ca33a0c1fa4ab. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZTV32546399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd392ac0fa2d3fecc7e738bf68cb9eb4b13eadec51a678cc387e33c20a744b0. 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/QZTV32546404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fcadce108cfae9216e60d74004ff6d056b5f7a0f5591df7a1e9217f21e9984. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:52:07Z), 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/QZWDD2531068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05d4daab3475da4832683831bbe6b38296d73c13a32af6b599a2a2c7bb5a59f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWDD2545201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cca35fe88e43fa2e9b9ae07ad3d32efa497190268693dc1f4b5705f8aa923d. 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/QZWDE2528315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675e0dfac845ca77210d3fb483f28dd0a133d84ed4b2f73c3732a8e933e9edf8. 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/QZWDE2530589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc20c0c17319bc4dbd420e19ce6a1c937cf0e9f1883fa3f54e22869878aa7865. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:25:09Z), 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/QZZ8A2508053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2479217abd1492c3632fe225ceb977aa2c4a744aefb700e5df74c73bac8284e8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:44:19Z), 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/QZZ8A2540821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cd957f1ae760bd2008a8dc454d143e819b3424c95a81c0aee9cc480fa58d39. 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/QZZ8A2557095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee5c0153b69c4481a17cefa66f5a57068287d35ba431f084ea836962aa8a765. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:45:23Z), 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/QT6EG2544607.