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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 0x35fabbaae698f163d1908aebb12b1abe1fd24cac3eae680ca9b3fb3c0580967e. 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/2b6748b9-a7ed-4efa-b823-9ef429c3fe56.json and https://artists.proofprofile.net/proofs/artist/2b6748b9-a7ed-4efa-b823-9ef429c3fe56.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 0x1cef07ae15acc07e0d0f3b059a1ead7a7a7cd72287d5dcf63bf1a5ade9a5b9ab. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCJPS2258959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191f21099803b4105fed4b7490841190895310d8a3eb335ad4faf968a16bfe3c. 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/QZTB22374258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3436a0f39e7f2eec17d396a80256c0feb73fbec06451c2e97fdab78c6f811e4c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM42K1872521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4707e1956a3a11fda90e6b3c302f38218c229301ea71bad0270a31482f7be8e6. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCJPS2258955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a115edab7bfac16291bb87a728122e1e7ae1c914cf077a26b7ee7735900dbbf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZPJ32317067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1162cc82596801fb6890f5ccd533930d75565106606d5febed55d78f49b911. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZGWX2213958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba6d8d10e9d6e34a35a4dd5b7b67f9491fd5e83dbd32e7e73151fc68f6bf322. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEQ2429018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82d4c3985ce7b066e7df84c23c3b5219091b65aeb6a4d421c95bc6c7ef1c6ee. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB82234593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba6d8d10e9d6e34a35a4dd5b7b67f9491fd5e83dbd32e7e73151fc68f6bf322. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZMEQ2429018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82d4c3985ce7b066e7df84c23c3b5219091b65aeb6a4d421c95bc6c7ef1c6ee. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTB82234593.