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 0x3a7538c91a14ea815fde4e3252a28fe753c74db9477e6564c3f4bf8fd5a2de26. 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/0c4cb076-e9fc-41ec-84c5-7a1333781756.json and https://artists.proofprofile.net/proofs/artist/0c4cb076-e9fc-41ec-84c5-7a1333781756.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 0x6e75d60a95910bd468b76a81d6c686712046e98fdfb90f1198370a2b16089d80. 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/QZTBB2425205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6367b5c8c1858a0b86b111ba8f3ee24bdf6f1a7a46f0b00470ecab0200d76c65. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFM2384960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbc8017fd399c584ae2c73b7d4ba3032e8187c696e429aaf2fb2578fea9d193. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAY2392683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcade223b4c504c1d9831d844523f28a38ebce509538f0cc8a14c037467057bd4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMEQ2390457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0b20d68bccecbfa7e89953b99db0e5f8763aa435d5f9ee6901a05f4734df2b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES52349229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b14a062a5abc660f6c766c8b41642443f59188ab0d6db66dd92fb3fba0d538. 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/QZTB32234052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffc5f0049ca315d858f0f8f60c84d18ae731b5d8ff5a216e4aadbc7a4ff0890. 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/QZNWX2288834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4760dcad42fdf0dee0d33c60f21701283554e491473955e4b03ce700ed4200e. 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/QZNWT2232988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cebc482acddd31f45c32ba024ec867d0a48594ab9b4e575264b8a59dbd7586c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMEP2248369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541c4086fdade793da25b3f0ad9e5c8c1dfa48a4fb14b94871ee4da786b9a34d. 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/QZK6G2265773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7805a50afbd6797c864ce256cb6abddca7c1ddff7bc71e9324634165afd2bf51. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWY2318271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c97492982a274743e06a4084ed5fdb1c9172e3a707630e3934488a2e5df9ab. 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/QZMEN2598055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf100ac9a2adacca566f87f468f12fcb2f555ada179fc387e5ee78e6ebe631a7. 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/QZK6P2529679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfc2abdedf29d4c5cdaa4c5fb93f5ce86d77989be339df7b7b541b47eb59bef. 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/QZHN72548334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b99e44898afafc2cc42a37e3cac50b148b46b0163bdff134680f7ffafdd1c8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES92552519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf7980acef8a352f311e74545d95302f7653e637e267767cd1f26866f6ee3a3. 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/QZFZ32558500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c5a5c49fca0e78f9bf2ead15202512768b055c2dc4ce0ad79d8829a64dbb2b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFYY2588162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0dd28d9e16bed190ee1d06b9d618ec10be2567a29e9aa539a02911ff6c8d9f. 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/QZK6L2260310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8c2a8b25e76eeb5b2dbb75871a6dcb28eaa64e997e85eae48eee625e54eb3a. 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/QZZ792435857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991c2c9b8c4c380180fd841d406b1913b0a8457fd3b84702678d5674a737b7d1. 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/QZZ792435859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7249a1869b7999f758eba6ad647fe890a157ca9038c11413b5e0927f7359b361. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZZ792435861.