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 0xd8a1efcec73e8f8fc2228ebb7c854c86dd56e6257631c11e887f90437985a141. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea1cb110-42b2-49c7-b67d-5f35dfbada0d.json and https://artists.proofprofile.net/proofs/artist/ea1cb110-42b2-49c7-b67d-5f35dfbada0d.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 0xd6122e28d350649324ff87f7700739e3eba4bb29333f57f01ea4cd85a1b5a3eb. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GXHG92527896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a28e837f9ca6d122317960e4ce98202eeb7c4da0fbc6c2db6f06542e228e9da. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GXHG92527895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226b25f67b45b4da34f47c944a6af31bc1953657a355f4b327af2a52bb390a92. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GXHG92547471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a96986485700422fe3773ec10e887ca388981442e2abf0349a35857001cd32. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:06:03Z), 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/GXHG92547470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafac17d364552314471fd63cfd612ed3448878845a9c6ba8cee4bb48b5d49367. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GXHG92547472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5c64334fa0e02f07cdc473c553d9a44b605b952b30aa4c2931e58088216bca. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GXHG92579480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50edc56d099eba39e393f63cbea6bac0553a49be661c6a920f2db21a4b756e3f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:29:13Z), 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/GXHG92584647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ee9f73fe8c6e50478257dd00c5e06c4bf2bb608a6305b72d2d3b0ae86d9f1c. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:10:58Z), 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/GXHG92579479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30121e45e688344c38913a80799c2ad11f383a5fc2562354358e4bfecb6a772. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/GXHG92579587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f96ecc772fac988d9cf2e3e6a356ee63fdd2b4d2e7ea4f30fbf183b731cbde1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GXHND2500819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fc1acf7a7437f5962cafdc6922b6ca4b3d0daf0a63acf742a866eca2440bcf. 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/GXHND2500820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf804e050259442a737a00970c8ef5b43f3aaeb57420c21369e3d9e8079a50256. 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/GXHND2500821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a5a452705d8d4af7e4db7791db25e3188b1461e37573cf5f03dedab8330588. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GXHND2500818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd8960a84c8c8d84930d7911aab90c1040eef9f54f8cebcb58d03a4a481e111. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GXHND2538994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bc7b9873698af312ddcc523414d0b18eab38c7c11131a351de7d0082a4bb25. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GXHND2538992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbc50b08c4f1b9032f0a143c8485ebf0d8ae782ce511b598439540fa3b72d04. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GXHND2538991.