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 0x81289e8669e458d3bf5c128924c30a44f4c0836a1073fa9366591acc3f720fe1. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0b42628-28fa-4627-bcbf-fc3674fac7fe.json and https://artists.proofprofile.net/proofs/artist/f0b42628-28fa-4627-bcbf-fc3674fac7fe.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 0xf00ba9becf3b4764ac7240a4d7ccea79a477ecd0b09ca8524d2d7e875be4e6c8. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:31:24Z), 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/FR9W11118322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac84eaf0dd3115f411ed5d8649e1b3fc0f9fbb96b26c67c9b4647b19426d813b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:02:50Z), 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/FR9W11323209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6207bcb28ca513ca4b63d7c36976685d783881790a6cf3fb2414a031efe0457c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR9W11722863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af22b97d4577779b2636d9b263bfe63728f884a203c099e89d050d43808a6af. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FR82S2300092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f50fe408c10b19deac39718e3ac3fbc38aa0ce0aeba96fb9b692d08c14a7c8e. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/FR82S2300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29baec9c8785f69bf2c2b41cea482217ef26eaa1c09a535f86880218fa991073. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:58:39Z), 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/FR82S2300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477b97f8727a9a3cfc1f51766fc426ee0842a12f8d1796a398a4cebf544d3940. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FR82S2500119.