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 0xcc900da5b0139f551c9c3c672cb5f8a7d944239250c3e4f80443d31f401d9bab. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3af3e3d-0bfe-4c75-b7d2-54a4136f74a3.json and https://artists.proofprofile.net/proofs/artist/f3af3e3d-0bfe-4c75-b7d2-54a4136f74a3.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 0x90e1172185073ca35883539ab481b54c36b1aaf5890e83cbbf26a9fc5dc4887a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/UK6821634151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4486898d56be7ca6d58a3eb397a63e7e3e05402bb141d4a980887c0921193a93. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCACQ1632778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800a74524d01308f9d0aaadd8abcc6cc75b890fc669d4c3ca3247b8b24ef86ae. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:11Z), 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/QM2PV1693999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93a9a3d05fe756260589d1458ad3187f43aa439694191c5c9c60566317e3ced. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZ4JJ1740390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58af00db72dec29a5750ca3684faf17906e9090ac0158c4e4a283318ac628501. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEVF11800349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc4ddb903ab0ec7d24cceca0178e1264a7d96646e2c21f3b1a272741131f89d. 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/GBKQU1916708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6715e7ba08d633c3171c382eeade119e97bbe4cd02145d072ef921879b85950. 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/UK6821634160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521c69a5250fa73e394ba8dc1aee873d4ce736c55b7c07772713b41736a3f2c8. 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/GBKQU1852691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a2513069dbe7fb227d1f6032c5b8e1894981aecbb1d4055c4bbb34ce71728e. 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/NL1LE2000742.