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 0xe96ac21fc88b7fe00ba30642b8b761b4ca2d4f8057d7dbd7d99c53875dbc74a9. 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/c59f790d-980e-4fd6-a740-f61109d475e5.json and https://artists.proofprofile.net/proofs/artist/c59f790d-980e-4fd6-a740-f61109d475e5.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 0x0d597e85313e35919be8b0727b220d1329b3583fd3ac4a3da9c57ffa62d2937e. 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/QZZ972326345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560e0937e1bb42a2d87b388f011449ca2eb57ee734f4ec350915d70e2315e911. 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/QZAKB2325677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc579ef8c4aebdad9ba4ab6b0430f9f1c59a132950d1d03d7c9fb2247a1746d3c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR10S2357895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd095783298a606d47cca0079fbb20f522f9275af971d70dbc08804e63a1d33af. 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/HKG732041110.
门后烟火（《过门》第一季广播剧主题曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6abb9b37ff4cd38afbe44fa2814a4758cbdbef122f9be173abf64ddf2ec4150. 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/HKG732427944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfa28ba90d6b22d7a2ea89399e2faadc8bc7e7e1234cb974c90aec0478d17c7. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZXLZ2315068.
人间纵我（《魔道祖师》广播剧第三季主题曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2a72c8ed8b16419ee4e80619138f9095d36b3ddcb1d48535e7662d46e9c4b3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG732427981.
忘羡（《魔道祖师》广播剧第二季主题曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d175b58b0df702872822c8731ae45d244059ad559d2e299254dff8432949b7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HKG732428023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1708ca6f317006dd7a5e9ee29d95d633f7d752cfc484b5593d17ff7628eb0a16. 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/QZNW72392905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0141895664006dc040c8930ff637c32643563bb39acabdcba8cf5beb3d5208ce. 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/QZNW72392907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277e10996a33c63dd9ecf5a92d9a83685d7ee8fdd081bc52ed0caa28ec0e7b93. 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/QZZ972373240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5551b8ccd414112ae0535cc6ccc96a5b22d8e5c16bff0af6051cdc6a351fe99. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKG731859223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbead7f691a204c3bdb5df46fd54fc97598f3abc469a6f70725a3240f9eb7b4. 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/DGA0Q2376683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e5787884a07e04ebb2b47a51d0294a96d108fd76d65730666fd3943a081600. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DGA0Q2392126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef247e80625c850041ae7cbda9514a9a10152d312cd7b55c46a0d9fd5a971bc3. 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/DGA0R2300556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7fb05f84ea0039211a71ca07c301e62db2b54f9a76aeb0a1a6309997b2a797. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DGA0R2304056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ab7aa1b3d341de76d644332b20d5a9bff06117cb2db438cfa3ba57f513db5a. 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/DGA0R2300477.