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 0x706a359914a4e8e3f9912e7372d86017469af172fb1f82a83ac52a950b2b1bb9. 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/2af7d0e1-6320-4465-9e29-c6f7853b55c2.json and https://artists.proofprofile.net/proofs/artist/2af7d0e1-6320-4465-9e29-c6f7853b55c2.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 0x0d748dffbeedf0baead0a52d790660478a0ccde0eb0f434b2ea97763fced673a. 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/US3DF2246351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc312742a849e2e107da97a17c58d96d7ed84c5e0e2ee74d4439875436b711d24. 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/GBKPL1830206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fb4c46ea108c586434624f7c1fb38c5693626b1dadb23f3c6e1b2474c4c654. 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/GBKPL1934302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4795ea7789f6713498c714b6d8ebc3aed0f0f95cf39bb2332e4f2b87c92d84. 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/QM3DF2219237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e2f4009ed4dff3d7574540b1f85ea9dc1548b56e802aef0f792413aa68eb05. 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/GBKQU1987791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779c1d7f2c80e844b5a0a2950d498a46245741e6e2b5ef25e07b35dcf6f796e6. 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/QM42K1740250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2aafb1ba8e3f83de6bba675423b84a0f75dcec16502c75cfea650abdf304dea. 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/QM42K1795072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393fa3c30343966a92911c1a7b41a7b65fe85dcaf7d4704cc47ba83062a76901. 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/QM42K1716402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefe3d038e474f71253eb6e780a5f0b43efded15a1e6370d0dcaa902481e7260. 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/QM42K1708579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fe46ed0390bad72cce06c8364550f0ae27c3b367ce451793fb40905ff97037. 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/QM42K1708577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adf93f61ccb761f15e74c5b16e777175dffa3bccb43c2b7081052a668e68247. 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/TCAEW2003293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf790639ac4442485a764f567194fcd4c62eafb8eed1d938255d37ee8a172a3. 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/TCAEW2004752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81193f7439a0c1c2cd906627afdf1f39788bac83ac5d8829b41356994a22754f. 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/TCAEW2003188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86202ad41f38d253a0114ec8cf37862a2ec401db7ae0abf36c4a760882d3d23. 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/TCAEW2004761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d56b09e8a45571764ac1cb0f8f502058678bd0dcc56d82e95ffbb4ba18979d. 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/TCAEW2003495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2127556cbc4a254a4289a62d58cae05dbbc6fa9f7fae81a9553478458693d50d. 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/TCAEW2004768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf98eb47586621478fa5e43e13b342d6309cc1ed4c3a9ae1af847d32532991ce. 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/TCAEW2004781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d548077f1b5909b33df9c7e937c153c40d6d040f5886760989a743742ee6a2. 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/TCAEW2004785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf9710c50ee2fa0dc690861f9788e3d4b8a07f64002d7c6e9544a34c1752eed. 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/TCAEW2004788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6285e649522e6ca8ea53bd79dac9545e5277292444c1bbe0d175430172df070. 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/TCAEW2004797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc133f1233d297be6c7c54f642897e3d096769555d82897195eff5d1393e0d2. 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/QM42K1709682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b169e47fe15424339a7b29e26e34926326664e004d6bc28dbda9c6296fb8b3. 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/QM42K1709683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0ccac99b7a5f6d4918e951b4700c82bdaf648686f1b2fd0dcba53b5b8cf40a. 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/QM42K1709688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8be1cd88b553bb961e9950e65dd213f232326a0bdc1eeb3b6bb4d4981e4173. 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/QM42K1709706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c587081baac75a89175988490db880d4c42086f1e03766b55ff823c0341045. 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/QM42K1708833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb497c5b01f4aa870ae703eb5ccc4c1836efd02d9a4e802ce75ea3366689ef0f0. 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/QM42K1708836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34520b3379b25d4ab8e3459cad59a616a72436f6be40c3e15a3e9dc2c8fe269. 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/QM42K1708840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88df0b931541b495d5f829b9816bfe4673b4f2cba17b6f2dfd3aaaa2efd8a290. 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/QM42K1710355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4579f1ed9a468d475ff9ef3c34084cc49aa1eae5a49d993f6a1d5e1c03b3f3c. 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/QM42K1738754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83add24a27e2f4a0c6ce59e86d93eacfae7a46e1b376316f07d125d9ece2426. 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/QM42K1732337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d8c5881be3c2f9fd60570870bfed5f321108ff80be90068c737bf808744531. 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/QM42K1775225.