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 0x88cc9649e5880798467d510793b30533792de0b9098770b69f7e13d56ab280b5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6f92011-fd5f-4f99-9117-6020f2c8e7c7.json and https://artists.proofprofile.net/proofs/artist/c6f92011-fd5f-4f99-9117-6020f2c8e7c7.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 0xb2251851eb38453aef94736f95e0824fef12cba1cbdf82e1c7bb7299e234280d. 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/TCAEX2087001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47695b70beb9b65c9061957bf4886336d621914de59fa036a97b664753a64353. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/TCAEX2087047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20751daec103804bb8fd219abb66d71272e7c4a6086973fc2af8809be4eb829d. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/TCAEX2087080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f609e80b12cb91b6add3208f160636504d788a8be4c5f1e9936e5d78587a80. 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/TCAEX2087088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5690376bb9ec41365087bca2cb8b0d615841b2332b17fbf53e5df589f28a77. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAFR2126252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73f2da2ca983fd1773cf7a40909ec18cfc71eca3133d36ccd6fc160536cbb79. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:43:18Z), 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/TCAGI2210033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9084e5ec1e11ec4de60cc15f186b99a1d6ee71dbe1784a4e60fac0d49192c2b. 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/TCAGL2288583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f69c6d1f92e9e547842ff081e5adb90061e23119ec1f7988ee5d9403cb8ca8. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAHK2399308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72c403458e8a4c5b00b758160d5522a512edc4fb43f24a08a3e75d9738a2c80. 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/TCAJN2539906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad03e679402893c3b41f72fcc102eb8292df496a32614099d5f418787d7cd312. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCAJN2553412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ac6a90a796605eb191366698b1bba7ee5ca99639c752a2c7128dcadea1ecfe. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:24:22Z), 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/TCAJP2555034.