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 0xdbccc3586e10b5a58980a9fe61b6717113208c285fcc56323905f01812abb5ef. 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/a437b3b4-729d-4e03-bdbe-1103a80c4ad0.json and https://artists.proofprofile.net/proofs/artist/a437b3b4-729d-4e03-bdbe-1103a80c4ad0.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 0xf48b014fa99928b08ab3b0fd09f664cd70e464099b3cbe6157cb39779814b510. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/USMH92313286.
Bu Rang Wo De Yan Lei Pei Wo Guo Ye (Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f749d4b86232b147567b1fbec39311e9e8f2a62732826bbd7a8baaf44dcbf47. 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/USHM22405655.
Liang Ge Ren De Hui Yi Yi Ge Ren Guo (Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0a655b91a802327ef5fa762eb39207775958e981176c6b91c98906995eaaac. 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/USL4Q2393662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa0dc7cd6db4aabbae0df11c319aad82549c48f8fd7da706e9aa411aaa3db16. 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/USX9P2337301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18bde189bbde4ff84984cb74d791a8d8ee51735e2a0df265fb9756a04fe46a0. 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/USL4R2304856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb576e3dc04db23fea248f37e9073e94d02250f0d0ac865b75887526da0016873. 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/USHM22405649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36228e0ef57c0d15ff609485a4759b629fafe7238ce9f197a0ad31dd79786b90. 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/USCGJ2491894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899404ef5241070caf747f3ee985707860f6fba6bb5cff2646fa22e7a4ba7383. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/USCGJ2473969.
Qiong Ji Yi Sheng Dao Bu Le De Tian Tang (Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbbe06c30f594dc9c7a4022805df0542f1246f6b4bb6c12e72e3a2cd4dc2473. 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/USDY42481581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c651b42a009c944b79d955962c331ebba4a73f3aac423d5545d8ce1a6f851a4. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/USCGJ2473936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66634eb4a3aa7d828d836a6c74aa87fcba6b4a5094013d5868820e8db96c7da. 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/USX9P2337290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4c9991ea6ce16582833a4652de947e7e848c37a771b97d7e07d84c0272e4fa. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USCGJ2435557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704212fb064fa94b369295a762bdfc966dc489604d4d6862b5f5dadf65b566c1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGJ2438062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00dcf7e11011541e41df7c521fb11d229bb1fbdd520aebeed8e4d848b3f59e84. 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/USL4R2375107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2216ba62ce4d8bff76aa727b49cfc4d6e4751098615ddf95f715c7b0f09ef210. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USCGJ2444701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e47bdb2f25531283b3e3c749c3f07f5dbd8b7ff442e941385ababcf02a8ab05. 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/USX9P2352681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac84d39e6666c7e5cc97e882942f484c792620b536d2bf1cedb650a7f702e63. 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/USCGJ2444702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d888f3a9b3d2293d511d8086d67dc659ab537fd6cb1717f5e6e0a60c284016b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USL4R2377189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179f6f8f68a3404419881a770e84205999fa30294e95e062044ac492f1f153ac. 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/USCGJ2438097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d07f34f5b52f967344b745417b290a8e0b513cd1667278f9f64edb25e4f219. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGJ2438085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf43345cc8b58364c30d6ff80b524732e2fd3b9a38a8fbba98b65496009c12cd. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USCGJ2473917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b8cfa4e8319ae9f878c2bb25c57da2537f940d54e8f25f9a53b8e455bb9663. 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/USCGJ2439179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5763ac78324a57acd9a7bb8adcd7e350ff43935ac4d7b2a9029b74f32eb4c33. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USDY42484221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212cf900d0c1f05b92a5a8054712bfba7b191d5458a575ac440e41f4695edff1. 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/USX9P2370172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1127d52b9764694fbd5db789d07ccf172001846c03e020a898049f43da599432. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USDY42414750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c9f300a9a6fd8a4acec22d4c15a2934daad18398a97a69c5b4218309d39197. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/USL4Q2382609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd8c441976aec0c74098ad01e257e199a595edcb16cbfbacfc7525181f0bd22. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USY282318888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c29e86956ac05760eff69d41e4615bc1afab1f28845a982fd0d235e57238568. 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/USCGJ2491863.
Zhe Shi Ni Qi Pan De Chang da Ma (Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232edd03de3e92c7359b415e29815f0a92f01da28c6e6533551f6a40ba944d3c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USHM22422660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc432e99370a9fdb1ec1f733cc1393d9447bc179b224f791874d83749668f4713. 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/USHM92412122.