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 0xcc7c2452017d3f2a090459ddb7b53a19dbcb886e97cc4e48a87f5470610f9695. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23e32d32-be13-40b7-938b-8f4275f26822.json and https://artists.proofprofile.net/proofs/artist/23e32d32-be13-40b7-938b-8f4275f26822.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 0x27663a6d5b30d68ba758c65b3dff931816d6a706a70246187f6f6da9d70cd8c9. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:26:53Z), 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/QZES91897378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfb3f1ec9803e58ab2c78c909898334e83d213df86c73146c891737b373dae6. 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/QZ8LD1934566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f873935385f3028ca43173a67a13a33bd7ae35d11e031cff7bf24487488974e. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZDA71940040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16d192bbf4793604dc8bf7e639fb9926ee6db8238ec7d90d71af123e70a8f93. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFYX1964033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164febf2904aa981fd00c10f9f2b8a934b6f648ebdded6a8b5fb072518dcbdf2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFZ31951838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46197aebcc8f6b00223584f133e2c3801f543d8c4b60c41d4ca3545ac11db686. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHNB1948493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d1f49e8932718d58215b82ff706146a388589b752f0197183bc361eba965f0. 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/QZHNB1975878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1051c13c010ee285634f0e4e233a0a1badbb4a7dc2a5b12aa02b6ac59c14586d. 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/QZFYY2039188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25329101d4140667d54d3210b630632d17a9a461d7ebf36f854d5904dc6431b8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFZ22062487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea5f457a999246aaf5bb6ed2587b23a9ca8fa0bc21b150e13213cdd2fd716b2. 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/QZFZ22062699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a5be92c5f4bfec34de83724ca080a3aa8d675a9a6affa108f04385e582be80. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZFZ32005263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee96f3a195003af4a421cd33e98cb80f820b02dd70a5a51f68ed354cd15b25e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZDA72103573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b656dc89f2cd1dbacad743029cf38b54bb345945e30b3be15efb61a820748c1. 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/QZWFV2497368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931b1a278789d72e4b1e410aa10dee11fd9c2f14066e749ee15e85a7f9cbb79f. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHN82534358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1226839987f140ebd137e6c3182a142aa6e47a5e7138d64a4a9c82bab189f4. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:05:22Z), 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/QZNWQ2556093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1afa5f358e6d877301bc65cac1f360100542c275b5ad2dc72338510d6e310c8. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ7T2530742.