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 0xc76f23f253c63126f682532b3839d8c90b52f7d64f4523c2badc9674702d1347. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68f1e2a0-c8c0-44d2-bc20-2f3783b0af55.json and https://artists.proofprofile.net/proofs/artist/68f1e2a0-c8c0-44d2-bc20-2f3783b0af55.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 0xd9d160a3d8f20b8e3028bae304adeac37a8778328007aed66acf8dcb651f4f5c. 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/QZFZ61951063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61607856c4cc4983f529e952827fa579d74ffcdb57993caa74745225a4c3e311. 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/QZARB1835910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7016981f14f862fa9bdf91d93beae44baf6014ed5af702268690ddce3d5c86. 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/QZFZ61949724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551a516e7d22d99f2f77aed951599bf06ed6da3423b53a048b24c69c38a5bc7e. 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/QZARB1878333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41851463d07d1514e18555c8e2b1569d0034988f8c64a59f82069bb4f3db86ef. 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/QZBRF1897908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7107d5ba28df411b46a56b1b56134c157e0219a3807b66f45e4268869b65c0. 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/QZFZ61951064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bc27fe1697c0c4b8d518ca9037e57624d05d80d530599d76d25d3af454777f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFZ61951065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34ed6799bc2044c88954ab495d6f8de3c123243bc38f3ae5549fd8a7762cb1f. 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/QZBRF1843949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6c4ab87651429abc3922bd29ff09f5a681ca044389005d5fe6a0676b65c4e6. 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/QZFZ61949179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd4a8dd7a8c431a5ca7e3c2ebdb0387567944a36cbc64b152d39e3c971134d2. 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/QZFZ61949725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d53cea1bf685aecc4ae775ebc1c17991b724aee616921f406cb4e460b820195. 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/QZFZ61951066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd4a8dd7a8c431a5ca7e3c2ebdb0387567944a36cbc64b152d39e3c971134d2. 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/QZFZ61949725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7016981f14f862fa9bdf91d93beae44baf6014ed5af702268690ddce3d5c86. 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/QZFZ61949724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6c4ab87651429abc3922bd29ff09f5a681ca044389005d5fe6a0676b65c4e6. 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/QZFZ61949179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41851463d07d1514e18555c8e2b1569d0034988f8c64a59f82069bb4f3db86ef. 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/QZBRF1897908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34ed6799bc2044c88954ab495d6f8de3c123243bc38f3ae5549fd8a7762cb1f. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZBRF1843949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551a516e7d22d99f2f77aed951599bf06ed6da3423b53a048b24c69c38a5bc7e. 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/QZARB1878333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61607856c4cc4983f529e952827fa579d74ffcdb57993caa74745225a4c3e311. 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/QZARB1835910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc941c30e915741d4b8e4e20bb665ab982a4d4edae3525589d3a4d1b8641e344. 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/QM2PV1879133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990cf04f9d52537ec359d3d1b3bbdfcca6f1c4db95fdd50731889a59314c90b1. 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/QM2PV1879134.