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 0x4a870b697db3dc90be88e68f6b28287751b28553c955b506e4fd2eee6cacd7be. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7dbb313-e2a2-409e-a692-ee319fee2995.json and https://artists.proofprofile.net/proofs/artist/d7dbb313-e2a2-409e-a692-ee319fee2995.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 0x49002b991ae0beebe8018f66482417e2a6935033824d1574f121c2244653231f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA82048613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235ca9555a20d0908fc891ad77efd37933f75eb4d89f5d716695cfe83955de0f. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:44:46Z), 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/QZTAW2318435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f2f8fb60b1cea272663146884cf4947f564c914b918a32e33614a6fca14d55. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTB42470871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5f7e58cfdbef49c0105476440a0d1e284e3057534ad5c88acc3b776d51fad8. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZWFK2432314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff84eef79eea9c2179cc64992be39efbd74d107bf34b58784c661fc8fbe44f08. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7X2423826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41c270c2ffbc9b285cc1c650e8318b12eb8f271e36f0fac09fa3abfcd3d51c9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:40:17Z), 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/QZK6P2578110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3bc29cbdaf1de543460b8bb435fdd0bd6cbb8556ed45caa63652746242602c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:42:29Z), 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/QT3EY2542260.