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 0x7f2de239019996314e9f38ffbedb6698d73f72df105d2e53bd2dfc804a356c78. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa89d517-013e-4964-85d5-76b68a629d55.json and https://artists.proofprofile.net/proofs/artist/aa89d517-013e-4964-85d5-76b68a629d55.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 0x4de4d4410ea862bd935ebe5ef6db6cd4e3aef0561e2f0e5f3700f1b78ce0a194. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB22470907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dd36127ac47088962558ee251b03af87bce7fe4cf5e7f77948f8ec87c754ce. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:13:54Z), 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/QZTB22470910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2203de1620b31c2578e1de3f333e30e188c6e9cdc5063936cb35face0593419. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTB62444966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae4a43465b227741d5b2b370218e366f04120dc9518dc1527b55cfc0cf57b4a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:18:02Z), 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/QZTB62444967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92965f581914b842be2c774c1b1a495780d1af49d5e6d667f9c6cff783e8ba10. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTB62444969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912d61c194978dcaf68be76fa2495d2d2dc7dec97f06a44041020122c9d173f5. 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/QZTB62444971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b5981208205bc10a41d5532e63a25b9f65fce761b6603a46662e521224de65. 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/QZZ7M2476148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550d1075f3a54b52197bebb805b354e7bc8d706a1c548383b71b572f05edc073. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZES62522233.