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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52732be75f98a1c1a57f0c30e2bd6a917b08f553cad644ca5a2fa0a6f30a1f15. 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/CUA011801401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd45ff93d33b85f6243cdd8cf14ad81b4ab78d1baf36e47bdd29e40dc88ef9d. 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/CUA011801407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5f32239d1e4e523979023ece4fc7366cc0e3f96d1deb765f406f692d248b4a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CUA021812570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c434932f7f7a9b22b51c96913c58aa0a27eda69702eab8644f689852e7e453c. 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/CUA021309968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bb99bdfb5368d78a4260a84b00a7600874fa7566d22536fa47f8ff02ca62c5. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CUA021309971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9171dd3e6fc6509403c302a1682f0af8213b1c876eb7788865f36cfb80e076. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/CUA021309972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae157664153575294a5cd726f8bc1d6ca982f29e55ee1c76190ace685c713684. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/CUA021309974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d099ee95f388f4fc2bdf205e3d8ca99ed8d1330e6049158d3741d31e2acf952. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/CUA021309979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c477d0e08d3575c0782624dea31c62de0361ef144beb0eee12a5838baa81f30. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/CUA022215289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afc841a85a8f3de044c3c1bccb503174271a9537b600837bc935f63d35ad544. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CUA021611575.