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 0x4c48b937fb0f152627da7cda99e8999592a916f5ad3b66e8904da600fe8b1748. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/333a9a7a-3cc9-40e7-a7f6-84edab774633.json and https://artists.proofprofile.net/proofs/artist/333a9a7a-3cc9-40e7-a7f6-84edab774633.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 0xdcf6ed6bcafc011850f49242a93ce9c1fb832818ffdf14b02b2512b9f366e19c. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZHZ32033807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb451963f48b5ef15e97c80d35117c1ec8a13328ad7ae245e4ba841bacebd8169. 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/QZHZ32033813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e952ddb7dd9f53372fada3a5414b3a79d61b9543fa1b3c6a5bea5dcb9afc6fb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHZ32033815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a155abafade2c9d098b8ddf282dece8257391f8332edad443ce94fb1de00c37. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:12:01Z), 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/QZHZ32033765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9b76f23366c9410a6393f74d9d8996707b5b0081f8946843f841babc04c23c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZHZ32033766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ba476b0e405084b28c77e96811ad06b9bf70dabd363afb17c3f7927b2333a3. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:08:23Z), 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/QZHZ32033769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245398924193309e2161ef0a2dbbb7f55bd10b5bd925129e739e21c60c9b6068. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHZ32033776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d741702023db8820ee391ddeba6b8b2867ed614436ff69ae340d773bbb9856. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHZ32033872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fc407b6862b9b08d86ef666f88ce2d0bb26a3e94f741f9ea8fac893469050e. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:35:10Z), 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/QZHZ32033873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28465c9cdc7dd94840877ea381b47a767690cfcfcac38dd455d17c0a80637219. 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/QZHZ32033881.