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 0x5a8f717a6d58662f99122d08f6899935cf343d3f3062bf28fb17380c2b0b2a5c. 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/9b6cf2e6-2915-4a72-a158-46c99b68e1dd.json and https://artists.proofprofile.net/proofs/artist/9b6cf2e6-2915-4a72-a158-46c99b68e1dd.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 0x8fd1551e2873ab1563c04a2c0205bd26abc5efd03f364a0cc271559d89499553. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QMFME2432521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4aedbbc6e15bb882e37967b2506314c346919fe67d2630f03b585468c39b273. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QMFME2432522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec6c193378de856077ed697caa73103225f28a065d40240e768b08b8a5b1ce7. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QMFME2432523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7283b9bdcc9e5719a25d17a0499fbd2eb2305d23f84ccbfab8248ece9e071221. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QMFME2432524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1d0bf991491b580f453ed110c6ab0d0fcb4bd29cb824953d42ecf9f084da0c. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QMFME2432525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f69c17a101f1045c3b68a28d09f1cdd21d0a72e1ec4ee49d2976aead3e8dfd. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QMFME2432526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad8dad4502b1578bc98ad55a61bc8d575fe286d22a79cd3d474ae5fec3b950b. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QMFME2432527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e56da0dd6c39148b133189f52db5d8a292481f4d498bf2528008df8bc2e415. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QMFME2432528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d065e0c1a93e7b7112d93e5298a5ccf578bde377a881b0671d45c7f0ae46673. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QMFME2432529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d023091ad3f2affc7de723562d5420a0c4b91570eca28f82d7189ef96580ada. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QMFME2432530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd562f51bb74c85ae3875267fc6b135ce76b15497674600714a178beb148ddd0d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:19:02Z), 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/QM6MZ2521944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb114c7e8a97491daf9509183dba3d5f397f1ab7190cd763f8cbff6c7d151c008. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM6MZ2521945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7966b7b9a8ebab1b556a4f192a72f6076067ae7799e42cf14b0fd8f275d8a7c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:09:33Z), 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/QM6MZ2521946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a734ba4496ff476c20761e08b3722447a23b38566c31736eee73ae9623b97e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM6MZ2521947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38f0297d81e0104241067d38ab8a1f979201c895d26f0e2b59831134e020b89. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QM4TX2578611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c6587be4f5491493307d511db68285c34eeea2ca4c98bc89e9ae29d1b32b9d. 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/QM4TX2578612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c885e382acbc8b7e7d4b4afd8b6a4afcaf600bc738e3483501e31ef367fb114. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:15:29Z), 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/QM4TX2578613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc342fdafaff45e49df45e819e7642f1c1a8327c9222d0d3de2118370e16bea65. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM4TX2578614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3157e8ec0113f408ecd306ba830c5f7ef4dcedf7ccc1e03fa1815b016fcfa7. 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/QM4TX2578615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ecf4a7de73084db3d0026128237d1fe35dd47f911973429295da5b0cd53b5d. 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/QM4TX2578616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5549624e92fb74fee586f6d5b6d9823461e8bc4b8934f41d6a02d68c19fe3966. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QM4TX2578617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1846cdfff25b47c52882fe4a72eed3ba40a70fb8600550eb3f36dab8fe3100c7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM4TX2578618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30dfa65350d77d1729343a24faeb794e0c74435e25a83b8fbf8e1d8c9023ecf5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM4TX2578619.