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 0x41e5429b3fe3a68255818736ce6aa1c48c77ab2cdd919abdf39c69026ef62ee8. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51b9cf2e-489f-4252-aa8e-3483372bcf47.json and https://artists.proofprofile.net/proofs/artist/51b9cf2e-489f-4252-aa8e-3483372bcf47.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 0x42eca67fd4fb5c09b60158b4e208621a3a10f8dd5aa485f5c00ff371595140ee. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZES52381780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba12de616e019ba349dc0faa7d3564d284c2ad62d115ff47b4dca7a20ef04c85. 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/QZNWV2357209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad49e519fb4de08c4f059430291fde7527eba96c47b0e24cd79dadc93ee5f904. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZTBE2384498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb281a26f90dadc3bb820a6a1b10cfbdf7f050cbb145c8b6b1ad81943957437f. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:40:14Z), 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/QZWFR2374716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8365e29440c06e8c386f7e945e1d2d77687359cd64ab0cc04d83de7269b39cee. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:22:28Z), 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/QZDA42437160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbc63f966127bce18bf64bdafacce5c17a9d5c854a910c9ae6257bd009f7408. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:28:22Z), 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/QZK6N2490483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0e96a7bd093e99932bea0d9e7b0f2bbb5fe1265d98f56bca86bd796eb719d2. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:07:20Z), 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/QZMER2401284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d64427cb08401d28d5e033bef45cad5532f7f1ed0528f8403521bcb8849c12. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZNWZ2444583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3b5619ce2d4f7d762ce3e0ef50a17ddf1c6696ea57fa639bf18b9ea16116aa. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:34:14Z), 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/QZTBA2491701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0802e8fef06dd7897b2a50abc0f7887933d2ca03b60ad4f63f5bdb3690d9f233. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:51:32Z), 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/QZES82534555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2dfcf7bd54bea5758f429fd39a59680c11e0ef835d2a6bb8ab77256a607431. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTB22598781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135a95cef5c8a4e3afdf73d47e02ec8deef63593963b72972d8e7bf8089cbf02. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:53:27Z), 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/QT3FD2588122.