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 0x678e7a90e2063ad88f044eb0a84be287936da9e4570548b400cb1972ae779fe3. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/620c82e7-163c-4eb5-be86-b91e71d0f818.json and https://artists.proofprofile.net/proofs/artist/620c82e7-163c-4eb5-be86-b91e71d0f818.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 0x133d0fafe4ddb673905785c40f763a20abb4babafa35d131f3c413e1854af46b. 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/QZFZ61974493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9823fdf0cb415a87d39bf830d2183b121f4feaad27ebe7168e45228e07bb961b. 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/QZHN81997376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f8b535ce4d5dc22072c1c9a3604583147dabf1d77216969ee95dd9f7e70e12. 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/QZHN81997379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7beb1772c20a93ee6b1b67eb51cdd98a1cc44547f6eb791b56ae6187aac36386. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:47:29Z), 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/QZHN81997380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b6c47b86b66909abbad8e4703c60681061b16c301b6f96dac2b5fd601d7b92. 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/QZFYY2199492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c83812a5dd70cfbae194af6bef0bd186a18cb0c5f9a16e6315b475f7bab711. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZFYY2199495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940bae12999934417f660c6910420eff7e18b7fdf3d0401a1fc24a7f573d4d98. 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/QZFYY2199496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff69825555f72afface48685da8012dac8c1e785f193ee718b2fc4089b28d877. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:15:35Z), 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/QZFYY2199497.