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 0x2bf69c7987d8e29184b8a6ee989d4f0685f12e4436e61d43357995334f162461. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1637e9f5-c577-405e-8289-63f6fd2b92d9.json and https://artists.proofprofile.net/proofs/artist/1637e9f5-c577-405e-8289-63f6fd2b92d9.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 0x888e445569e6ffd0ec0dad4b12e9a8c3e2a032afa59ec5911d2a728c5b6c95e1. 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/DEUM71603536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3acd9f21d1684093fd2a03a1fd59aa29a64a6310989e572de04461c627eea97. 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/DEUM71603686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa861477cf34b42057684cfd60d6221413bf1d4aa237b961ff5b58e989c341b5. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEUM71603537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437f7ba6a28b3548b71948d4b4a724958e6e9336214c69b3610aedf3d682f7e7. 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/DEUM71603543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2906fa6bd785e50dbab1d99d78622a8f172f2013e84f6649a81e8a404180edc3. 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/DEUM71603547.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0074a033461dcddd851c201cd9c25384c1c91f9cc96aa9cab94e7a0de265e42f. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/DEUM71603684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5aab47c06bfee4d8d1de16c660ca03d4e752933071be3054c2e90a627493933. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEUM71603682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4d526ad0e5f1e6bf04c4a26cf84aee3be9b25fcd8d73d8da9b3b0f5eb7568c. 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/DEUM71603589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5888a65a45514b0f848a9bff7fd5cb1de4e7bd6d4b847620dee4c1038d1b0987. 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/DEUM71603564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe582d27294116f1c7cac217b65210206473f478a8c0d2321b7c61655e4f0a7a8. 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/DEUM71603565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70293320e159cf858e2f2deb2a3747a6971d8251cded420c93736b5cb078666a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEUM71603673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6207d62a38fbf3e3a7715bb4a323a49bd391d31d39d6b354df6143074a38207a. 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/DEUM71603566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748cf8637f6a045a76d9b20ee4e7252d21a3c5f5fc811c8624977b0eb0919ee4. 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/DEUM71603567.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30571201b5ae20405201d1bb136a47dcdf13d6a95f249f5f8b3e2e2ba6b1a7ae. 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/DEUM71603675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376d3732d002b22c5507eea410a8b33d6cb2a8869de587466de74b21e730589a. 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/DEUM71603568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b4ec0945d37629905c5ac9e42185892d6b78f20ef691edf82c219971a1ce27. 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/DEUM71603569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c67c8a80813f48b28db2603a03ed8d8d03c83c17f9dc812148bdfa93802a29b. 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/DEUM71603683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa8ffa97d1aa76d7c0159ad40ece363ca3db9251da35ccdf7b1d5cc16bd3d63. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/DEA621601006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97575572b003129bf3bf8ebecee70836ccbd673d8e04fd82aa106ec8f47838d. 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/DEA621601007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd206811713e3d13dd3082b39c2311a105f72e480797d17baeb6f1e52776a3179. 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/DEA621601008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9804ec874b09c3aff10706fa4a1379847fcbe14f3d9e3f3fd464323a95c1e87. 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/DEA621600794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6054987f3340a074d32bce7fbd1d81907e3f186fae974ffce3be8a597b2a2ad9. 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/DEA621601011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5605775596382bc40920148bac696433b811f564bff64d091ecae034da7540d9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEA621601014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527cbe9de43779343ea655bf7756fe0e2a27698ce66b7906a654f922b50bd9f4. 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/DEA621601018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c338f133fdbd17b05b5d0c4247a5a537742a5ab36c238c88decd1d9576fc10b. 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/DEAR41892591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd206811713e3d13dd3082b39c2311a105f72e480797d17baeb6f1e52776a3179. 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/DEA621601008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9804ec874b09c3aff10706fa4a1379847fcbe14f3d9e3f3fd464323a95c1e87. 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/DEA621600794.