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 0xe95585394e37ddc470ac601720631bbcf9f3752dbd14a18785e380602493381e. 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/9a79e843-8ef2-4a2b-a86e-cdf0badf4549.json and https://artists.proofprofile.net/proofs/artist/9a79e843-8ef2-4a2b-a86e-cdf0badf4549.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 0xb594ecab4e9991fd2f13090c0a6bd87c4339ad4bfca91316d08a23fee4083548. 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/USA2P1855552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b6b676cae119e77889fdc1daf0ca3b2067a45b89f452f39b6f614ddcb20282. 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/QZHZ51949882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45d46723a0a2d899a26e3ed627be1f8d7cea60846b3f8651aa6be6cd42ca22a. 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/USA2P1907472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6844f7c5fc9b34b2c96db548d7fe70d45de62c88e23e1762c725c41287134f7. 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/USA2P1907473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d193f8dd6c51e15d556cbbb05f4a2a834a60d40f2fbaf3eddd8737823cefc1. 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/USA2P1907474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d31052476d32107a8056d9cbfc8d3708f8a9136293b168a2fb85b4762a48273. 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/USA2P1907475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cf118d3142bcb684f3dc60c38bb00e6a85d74a917fbb72abe683c25dbd2618. 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/USA2P1907476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa07a559e1531b60380938e4707172d3f9c7d66dd1d47d320673bf09051eee89. 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/USA2P1907477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63696992a550c69f258c57f3c895c8d6de86ac7ec72f72ffea598bdd88261539. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P1907478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e78cddaba849981b95abc2985ebda9c10b2a3e925d66947590bb6f22413845. 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/USA2P1907479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9d44616c5abf5f66356c9449725cb46876f5ecbf4f44bb1d4375ba28e3f6d4. 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/USA2P1907480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1e15dcb9002edda64fc5557c179ff553f98a0da335ce4807ab8090ee9b7ab3. 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/USA2P1907481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26018350c07700a0cd55901458412b9313c6a5b507796dfd6019b1984c2040d0. 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/USA2P1907482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1824fde1a37673572e416eea06a8f69d87480d6793ab294fa7ac9c51b64929. 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/USA2P1907483.