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 0x2e14149f065dffe0e83e6c657f93643e763316c0be0f484446d486a444a95db5. 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/1ec08226-831e-43ad-971d-4efad9db192b.json and https://artists.proofprofile.net/proofs/artist/1ec08226-831e-43ad-971d-4efad9db192b.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 0x4eca4e8e7482c437dde87a08eab199f6eea386d5b8a96a505feee91a44d66465. 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/TR6720900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87989e8852b0289965f4492d3d4b0b6e969455b3a6390f115d9fbffde25e199b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TR6720900042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b1aaa021a5ff9407ec06c5a744e392f0b444aadc9d0ae847f5c48fd7cc330b. 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/TR6720900044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8dbd4d347a4d4f2bcb89a1b15ae482ea477b4595015226a2d57af8f903548d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TR6720900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e972792e8e3c8f5caa4cd6e22fe93eb8e28ff8bfb6e75dc49383e612615e5e. 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/TR6720900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367fb5657068b6a078a1d4accfa912f22a6f7eb8c8a925f5d98825ca3adbf273. 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/TR6720900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd226bcf2a798996b6a773c1f2b793f5dd919f34babfffffb210321a6f6eb6c23. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TR6720900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646c629a2b555fd876e621dccc2e60fb9b729232fc71ca5a704569929ec72e76. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TR6720900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0166bf9bf4f1ba3eb7b2b4104d7469063b7950aa9bb3b41f916c9080f94000. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TR6720900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95111e952c77b5ace7a0c6b6f5d0dd49042819788c99d31cb56de19524029c0e. 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/TR6720900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c9270aabf31b257e637d477b1fa0e39e8a130a7a6e39d44adf77b31f1c0c9f. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:33:52Z), 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/TR6720900053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebd1b7718bb8870c716e4faa4dd89aebc223e01aa61ab6e2e81691543a5d8e3. 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/TR6720900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379b3a315b131219a9761aebeba3e0cd049c36a99b7e3db294f346447a71be8d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TR6720900056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd901575f8c61b9d6b7319fcdf284cf2a6706d1db91a9ce2f0356276e2d5a51c2. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:54:31Z), 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/TR5980900073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc510192280e76781ddd29f9127d6ee8058a8139b4b19f0434eac3dfccc013155. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TR5980900074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83dd4db19eb0958f234a0bab3d7dc26eefb2ce3655e07a158b13fff2048d55f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TR5980900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab86bf7b919628a94d70e4c09314d7bb32985ef7c4c1b914fdafb7a5ac726a0. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:08:27Z), 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/TR5980900080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa86224f8765085f9f5eb3c4dd6db7f4b749bbd48e4b8aef7420066ba278066. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/TR5980900081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73aa61eaa54b48750ed473b6528b77eda196d34241bf2d25769c6cecbbf40df3. 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/TR5980900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4237b1f94839b837dc8c356acd408d90aaa00a9685bd76cbd2aa5429da40ec42. 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/TR5980900062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d940d579ddbd27a21bb492225f7794724e363bc11d4275ca29b56002aa27c72. 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/TR5980900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5255b9007ed17481fb1d0332a241c4715e65570bccc6dc8c892097a16aec0820. 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/TR5980900069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bb45664f810178d42bfd133136fe44761dfc5af652c84ebb95d3fb4520f2b9. 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/TR5980900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf512a81c177ed40184ab8bb7baeaf3dd5951744da0fbd5d174b4e2a3c1af57c9. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/TR5980900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6381524b0052cf1cbe68d7c84943a43fd1b8d99adae515a6c1b965f304d69b52. 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/TR5980900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f25469f640af42e5cdee3abdf67567d764a631d0a37f1b7a83b1787e8196158. 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/TR5980900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbc404e98d85a8f832b9e614918c213d82d705f762b4a70cd301f18ac7f6edd. 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/TR5980900060.