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 0xc92d6322c1958e9b7b17fbdde0eeae3c98d474170cc63846a0ed6af5fe5536a3. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/492fab43-14c9-43fd-80ff-6d4890363831.json and https://artists.proofprofile.net/proofs/artist/492fab43-14c9-43fd-80ff-6d4890363831.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 0xc29f16e4a8d791633eabdefb1c7fee19d5cd7478eff90f04233bcf60a38e7b95. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ662320855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff37551d3ef2e5581a7e6826f8e02c489354df1a26fb66054a7a8f7f60ea71b9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWX2486885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd9ea9b83df0bad41315c620f1768bef6cc5b5b98638f6029ad08a2b8bd1c8f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ7P2430374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25afc2dd77120eaad4b7d2d2259371eb961cb6f93e2359982815f5c7ecbb7181. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZZ7P2430375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c28623b70bb5fe753df5fce028ae5f1df6fe6a783d6229b86b7c7929b699fc. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZZ7P2430376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc554e117173152986c0d7e010453aee0c58bdf612d7742e34105b68f750c11. 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/QZZ7P2430378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf541a286e598fbe03ffe1acc29b21d351786d1f45c17de21c4598aed41a01e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7P2430379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22582577309ad9d43404e50802b83338392bfc578f709e5ec24cc2c8405fce0c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:55:12Z), 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/QZZ7P2430382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d10b92272123e0f3ea8a315e43ee9433ed946039f4e8b03311ebabb2fc4aa3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZK6F2588846.