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 0x3f2e53fa625070418998cb832f1e7386f1c13de16a735c2c9cb869d43a3558f4. 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/f347039a-cff8-4c9b-b820-0e19056f0271.json and https://artists.proofprofile.net/proofs/artist/f347039a-cff8-4c9b-b820-0e19056f0271.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 0x4a3f5c24dbadb1f0a6fb5a67fbd24bffacb470a5cc03ef2e59fc9710a24c6aef. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHNC2468891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5370b75a95a6504b37bc83acbb82bb9c38b28ff11c469114e252b453f80274d8. 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/QZWFF2301184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fc9f2893e23e41a66b416f35242d704490ba329ec4498f9bcaf99e5f209661. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMEN2411364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b21055d6fcd39290b1ced051a69154c76733e6118f2e742d58aee89762825dc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA62439135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb185931e394ea20d975b2011ff2425db66a1c2c583a05f6ece09516a1db94f22. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMEM2398627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ff4e51fdc4227dffefdd7cd6d09c055c050920b9b6428c3e59be347d82eb57. 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/QZNWZ2256532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ff4e51fdc4227dffefdd7cd6d09c055c050920b9b6428c3e59be347d82eb57. 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/QZNWZ2256532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd76a750621f0b93955fed4ade2513f6078b59155bfbfa3610e75c3c5479788f. 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/QZTAY2317522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fb85ccfe7d9f01b61d7356811ebc4f9e591b89c9d5744e85a9c26b1103c304. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ62384474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd15ae9d3042f2be14c65a56e97350de3c131acbe25c0596a0e4978a3cbed20. 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/QZK6N2436749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b21055d6fcd39290b1ced051a69154c76733e6118f2e742d58aee89762825dc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA62439135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5bd261d841c304771486ea78b5ed7d74f8172813ad15134130cf7a2dee8d1b. 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/QZK6N2436752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747bf14f0444a7be2fb483a36ac5ee03d37557c103e5d411bf61b91fd13845f3. 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/QZTAW2470154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc032f5e1e8538621ea02ab599f678e18f0eb451173a9cd2bdbcf64324e45cdae. 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/QZWFQ2371505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942bb0011adc07285c2b6b95b717016a713da2529e2c743e03c6fb949be0fab0. 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/QZTB62371865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90a70c9def00f59a6f0ed4cfacbb8f5593ac0e04f835d03a47e4459f0a0f4bd. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/QZTB22248297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8a66820b93e1a48b7d70b5d940e2d8d0507febfc7bbe635994d521ee114219. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZWFG2427700.