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 0x65d176040932a69f5505ccd58325738e1be8c3adc78bd9a439f63c49bd7ee29f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b350d2d-a4ba-4098-aa07-29e1253f9aa4.json and https://artists.proofprofile.net/proofs/artist/0b350d2d-a4ba-4098-aa07-29e1253f9aa4.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 0xa30f0e0b661c6c940acd151aadc1d9ad3cb4f234234e511c71f22c9caaabe861. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CAQ661780002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6beeda8deb99e9daa0bf192f6d31461954b1cd5175c4c7fb36434fea56ac79. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:52:48Z), 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/CAQ661780009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ff7cbf17df302262910cb5b502c411cfbbd1dc75fdca5678e328de4096908e. 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/CAQ521808001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe218f901cd249ed6ec686939c78166d1d7efcb696343e15883234867d59b3c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAMNN1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981ec85b66ef602213a94457f0982c917ca8360cb5940685fd7dc26d74f58bd0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAMNN1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75757301ab9d60a2d20188cd2d26fa273f5947c9a43baafaf9129264e7a22ff0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CAMNN1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c45c3f74bb0000da0c4d01d95ad6227c228d2713a665b889102fb2388ff6b25. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAMNN1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6c3aa24b21a559c78cd39ec1bd6f4f9f210ca3cc5c4496017407bc5add5850. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAMNN1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4a00d71c3b57180eff8501426b1d3f422297258d0d8ec8375d9bcc7eda1ae3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CAMNN1900007.
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