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 0x4bc31c92ece689f6739ad9a17b6a3556073fd562335d0c32f65d296fcc1a5b8b. 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/afdcc125-9b51-4014-b45a-978854b52f71.json and https://artists.proofprofile.net/proofs/artist/afdcc125-9b51-4014-b45a-978854b52f71.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 0xe0ea90b1e71f4717fd85a23b58f946684154e9fddd28ea7f3402bfdd0afdc30a. 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/QZDA62014404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e952b6e4b92bd23580266cb8966967717a512222534e4fb1a92cc3c3020cad. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T16:03:22Z), 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/QZDA62017798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623dc3f207257d668a1aeea0b0e3c610c181dacaf62792147f867408e560a166. 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/QZDA62040682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb37ea1bc7971acf6b89a3c2983c7ad3ed29a09fac34278f85a88b25575cb1c. 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/QZDA62042037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40592c2e506157161866d7d2906202a57a250a068c8c6f81d0c702f8da3022ed. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZDA62041035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f184eec089e4256f0bb3e6a72ce0eb68bf838f72dee23bb50045afd5da13ff7. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZDA62042449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e33a1cb9e05ee5a9c31052c790ea5298f914924b6c7114cdc12fb14f6d18ba. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZDA82026967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6513d7864eaa51a67c5378a4c6803a11cf5645f826057381ad7ad321b5dd7fe. 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/QZDA82026968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebc2ec208b94d0f1802edcd61237db2fa7a2d0b60ac09bc714dbdc2ada30d47. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZDA72017921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf04db8eb7670d29d3eacf02817630aaec9f427262da616582e6139d7cc20cc2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES62098112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b05d31badd29ed70f8661771fac356c10609acd5ca0530a6f6b03256a77f0e7. 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/QZHNC2045502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4979a7fe8b06a044d9a30b1b83f16edbded2addf7161d0a45fd9b6e78e4f2631. 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/QZNWV2059594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb0a6b13eb2d1ec3cbf1dc3a8928f1b81425a6733f67d0efc093aa23cf9caa6. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZFYX2134506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900a59318a36501d75f5bd277b67806890b73caa741442b96d65687cd99fc40a. 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/QZFZ32108482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583c88f4d10ce634a56b0167d2fe67c893d780c1a69be643f930c0b8bb6f3aed. 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/QZDA62104519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48326e197e5942cd2600ebe17a61c5ffae0208796c39a3f8f2b77a3c200aa9a. 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/QZES72199478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc960e0f7602e58b57a5a0c08d92555bb588404d1fa3488b030115c79b9357438. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHNC2113985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a61b1d47ee07c507487793939cfe95b4bbb8e5436963007c0979a733da309a. 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/QZTAT2193060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71edce4fc006079881b4a1a8fe8a7846067f4d63b635472422aa873dc659aca. 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/QZTAT2193061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec52d87d46bda5351adeaab5813124230b091439d2cc7b9d7cfb993c06f3b3b0. 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/QZTAT2193062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2490035ecf43b453746c001d79a91312629573929cc14b2788ea29dc5685e60e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:09:21Z), 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/QZTAT2193063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8600c551c108293e13603bc6f9f78e74624bdeac87ab67d3c8ef57ce69b1ef14. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:13:12Z), 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/QZTAT2193064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462868f3dabb779c240c69387d92f72aa5c0b00a323680d954f1ad186d892976. 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/QZTAT2193067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ccf7489e5af14f96f154799643f4a44804ade478fcc33e5367ced791ac2b65. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:26:45Z), 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/QZFYX2277903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5b0ed0d791f2ca52d27685c4526238be40a287727791142655fbb20fe965c5. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZHN32230371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d18ecace718eb46b5a8abe867678199164bf3a4bdf02e8111a8c65b64770ebc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN62289506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac08d1c04b01634166e722f8c7e9f30763d5a436074121ca50ac8a37187ccd9a. 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/QZHN72297184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e4a7f863fdf47de70012a062d304e1b3a062138ab31577512e8859abe490ea. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:02:26Z), 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/QZK6L2255884.