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 0xd2b0e565968e99d323d64000db938968fe265745812303760b3b37a3b8bd1cad. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4444926-395b-4d73-bea2-3b5ed24809b2.json and https://artists.proofprofile.net/proofs/artist/e4444926-395b-4d73-bea2-3b5ed24809b2.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 0xeeabc68a711edbd8289860b33aebd0751302528b5bb54ec125d5e9aa9db2ec30. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:05:11Z), 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/QZWFX2448494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fa383c5175d42dfe41fe4e3c57c314bdcbdb397312ab970f25df0b64ae3ab3. 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/QT3EZ2437860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10535f4a0275df63ecfa0ac8678b03b9378d5f26bc81ebb492e1afa4d9a0fa86. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QT3EZ2437861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac993d29c7f245d8980418e46e73233d70a5caf3d6e7e531c0de648e0027a9a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT3EZ2437862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc514f5c285b424527a7c381ad373418a1eaaf8b92b17ed501bfb90b1aa45d90. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QT3EZ2437865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55adbca06c3ef5f7c48547fa0401da93fa56f721f0e9631e603063be494b69e9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT3EZ2437866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0c4ef7e82db3893f5c96ba3604f850e263c454cf7d7dc1d5d9c7dcb27e4f2f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT3EZ2437867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf4b85198ef0fd044e0106c1ff37353082ff6cb1dc8a61d4befd32cdc62f1f6. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:01:07Z), 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/QT3EY2467881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc16318f254b2f61629e5aeae6a596ea3c18196d725bc9ce264a2a71afff926. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:58:12Z), 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/QT3EY2493464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9da4112f63c85bbf2d592c986dcbb13bc1d0d5b9d4e79d0bb0f884dae33851e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHNB2548485.