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 0xfd62f0343515fd8c177b3315c4789bc3611d15176961e3b29539891fc3c4d001. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3b7b732-4a71-4abd-99ea-8949f93b8110.json and https://artists.proofprofile.net/proofs/artist/c3b7b732-4a71-4abd-99ea-8949f93b8110.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 0xdafc263cc424917f23c5133c1855e105e9ade9a6ead4c8793228d866f2e6f6c8. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/CNZ511800586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0e726285263acdd3bf96735425dec5c4aa69b300684a330a4cfad084148a21. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CNZ511800592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41975fd07d3322aef6c57887ac9319faa8cf9a8bdfd913d05fa438972f2af3d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CNZ511800567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808f926dbbdecafac30abb0e39df1b72c254a92f9e60b0285cb938b6e0d5e824. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/CNZ511800555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f55419ea3756df9a982a6139b06638f4334a3fc8e8d719c63c92d74b4bb5dc7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CNZ511800547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d7ca7af94fc3cc26f5d4ccb14e440154be9a166fd0e60a271ebd9893fc0fc9. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/CNZ511800545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b291e770ec86787dc4f8ef6091b0804677536f56990e1e6f34815ae49a276b. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/CNZ511800595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91a25866e9fbf45306cc96f9c27cb7e5d34d5529601149caad8a36788a8dd6b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CNZ511800561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4147f26a4a978a8d4be7df5300ec2ad2bdadf552bb2bd7e780cc1f6282ca6126. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CNZ511800510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cc48e7f11a5173196adf1c1d65bf5bcbf7a1df577f3629b19eb9f28dacf8a2. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/CNZ511800512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0326b64bcf5f61ce8a128d9398fae6f84bdd49f9e37de1f35e08a40a8463e583. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CNZ511800515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c33a4a85602e966465a115ee625499fc99c4c5cf196a2e59e08f32d1cfd826b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CNZ511800516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6295a7f8ef93ae63e7b8a176c87eb3ddf63500b8cdb72046f1b3d5a26fa6e41e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TWU712206662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a62bd0e7f54a0788f81be0eea534811b874ce2b6154fe36f0822e26ec41694. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CNZ852309895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d21721995c57e3d9db7658cdd5f87dc38535df0b70f299bd33f510f48a39505. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CNZ852309894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6addfca69203f5a53004e8b59e94ed72bd3f660cfcfc91173411c00e4ffa3c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CNZ852309893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db0a38a4631989ed088a2dd35bd19b2a996d26a1365d271ade1a3383c969cb2. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/CNZ852309911.
美好的事可不可以發生在我身上 - 现场
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eafeb18ec8361adcbc40a762a47c67e0250cfcf391042ade4795c873b86c8bd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CNZ852309910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82248fdb19b73c4f221ba285735a5f696ef15b590405a6877b7eda3616cee3bd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CNZ852309892.