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 0xc28b2058f84c861955180b8371e18068acee4950e6c87d091eceaef908a7df8d. 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/BKR3H2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a295f1f5a537826b7bf9cbac52cbad57ac05b8bee3b36d9f8309fdc0bad72ab. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BKR3H2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f23bfb5f30be9196e58988636d06198ea5a4b93e39a9333b0668f4c57bc71f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BKR3H2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab4df3787aa3ad778a3f7ce18b0045e8ed71967c0ac97bbbbf983c8796141cf. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/BKR3H2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cbcddfd8f92e37ae92a1bf033264a4b1dc35cd007995e1fc60e0482be132e7. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/BKR3H2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542f128722a9b900c163c1d83f49ac99701f507f026b81942b8cfcd95d9e2474. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/BKR3H2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb88a557ff48b96442ef3417a5470fe4b4c658bd124cad528b20a109a8006f75. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/BKR3H2500007.