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 0x3ede89f34894ed392bc217de13169e26dba4d73583157abaee643f42d8a40b0a. 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/1d6d0884-b946-4eca-a363-41e5bfe5fbc9.json and https://artists.proofprofile.net/proofs/artist/1d6d0884-b946-4eca-a363-41e5bfe5fbc9.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 0x05a7d7af15e2b99b0bc67bbc21557a6e14720d92fbe56fccbe1f39b385eb58c4. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZFZ62082350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467e4363b56bdf970316c10111483bfd04daa3f39b1ab905d2ca7ea65edfb6a3. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:12:33Z), 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/QZHN72067836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8e297ffe7f59ded060f2fe531c9422ff9037a7261688798deef7a014abd5df. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/CA5KR2069428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdeca7dd6361e585d08f7ee5060e73e22335ef3194abce64f1a612995a698ce. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZK6P2097035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844107e770915293bfe08340a8c724c373d88f8bf676f3fb29624a28df829a98. 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/DEWW42000185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d0a55456cfa49fab4aa8fb69e1285331ebad39f68bf27ce1d97fa306fb950a. 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/QZMEP2026698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad985c1f67299c356f03337a873769badd8b46fde254bdc7a90e76ed74aba12. 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/DEL712010289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ef3fc4560bc175cd7002c5794c50d3a8366bf4bbdaa816aba2d97e192c353a. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:42:05Z), 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/QZNWT2091736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc67318c688922656cbe9ad2ef9d725c25b7968d1ffe8602e924226212aa05c5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEW872205985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b2d0c6fe0be23086591d87d9b7f648e6c812780c081ab78a4ac70f9189aac7. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:42:08Z), 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/DEW872302221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8625cae53ad0a7dc6b14d17e3dc5d793240d62f6a32155ec0fddf206d675c9b6. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DEPI82311333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6d1a4ff69d28252686c3b37e470c5d4fccf2e1261aa25c7a362c5a17f14237. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEPI82411235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5006eac166acecd427e668be9cef9cedc25e835d3a7f9a00411dc67dbb44b303. 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/QZNWR2493801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34c89b258afc7adb4ae80292976c1b4baa8b3ea5c3d8f0d68e4e0e3ad630b0b. 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/DEW872205138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168acc7b7004fb4801218768b1bad088ad823bcc168edc21fc1e8b2a48221fbc. 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/ITJ512000089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654692e926745efb4aff02e6a963a62e7bc5041c9fd2788bb9e62607e8121403. 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/UKU932461083.