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 0xfd8367102cf6c1ba860726bbd90786abe377eda326f70ed12f84aaa113576aab. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/524c2ccf-b0fe-433f-a4c9-03f7a557941e.json and https://artists.proofprofile.net/proofs/artist/524c2ccf-b0fe-433f-a4c9-03f7a557941e.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 0x05fc12faafc1af568cff2b78eaea3e9c49a9c903cca3dfed5717c97637c4724d. 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/QZK6N2485592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cee4950381d130884be539f6badcb552931078fbdc214a653405204d1de2fa7. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:40:29Z), 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/QZK6N2485595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffca9ddee5ea3978da6426a93473514e0e85c6c6a4ab032ccd0405fb580b0440. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6Q2400919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce5aebba87c393a285d886d0169693908405f1ea12c438e7f68f796ca050c70. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6Q2400920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6053077074e794293952501b062a6b2bd1907aa3e71d6e4d51bc2cde687a2afd. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:51:03Z), 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/QZK6Q2400921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd10e1f1b5ead074e979c47f11fc8c9e8dcb5b6b76db4f1b01036c7fb878ef1. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:23:58Z), 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/QZK6Q2400926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788e6504a730cc20050cf6bb9a0db46932fce141f102c3e63346756a06de3942. 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/QZMEQ2499149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0055e97d330e0825014bc281d78f766a4a8b0930a94bdc129b6c59444233ac. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZMEQ2499151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e034975b1c0d595854cb5ff6f7afdefbc11ab8479f9b7f71753ea12cff77e3. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZMEQ2499157.