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 0xea93948c17c7e9483647f979a6b7739662673b1a51fcdb620d964f6c96c3b516. 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/2fbbed80-6420-4484-a9b8-4b75d9ce1b9f.json and https://artists.proofprofile.net/proofs/artist/2fbbed80-6420-4484-a9b8-4b75d9ce1b9f.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 0x25c9eb545714efa2d9581cdec6e5a861a08287aa8ed70a75700f059f590326cf. 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/PEBQ91503096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c91352c256a386419029571c4ab2b5e13a2b215607c100d3e7fd96bd6d8a57. 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/PEBQ91503095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de5fc1930df8ddbcf6b00eb68c54ac0219a94438e80038ca109a744045aefab. 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/PEBQ91503097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f564c38705c02e40487a6c840874d692f30330c352d9e8f63e5e05a3ecde84. 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/PEBQ91503098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d698506295a9ab55002a2e0c7ff36bb9287a51d6b01f032673a81686abb9740. 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/USA2P1400261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe635308e9b40781103740f94c67e2e6bff060dc308c83005e9c0e125c54db6e7. 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/PEBQ91503099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27d18f162a5c8d866fe660c3948a58ac5c9ca7e5c59dd1b6c4004fc79b74189. 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/PEBQ91503100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8a0ccd098fe1d401f8c64b8e30b7023a6f29718adeb06643159080e452e776. 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/PEBQ91503101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1d95bd08edc40b04d54d01dbf6bda59858f0c78400bcbd1e2ca2086f3e5b5d. 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/PEBQ91503102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ca8357bf382bd9055fc3f86ade504f5718d2ad8c14c4b68349b66abddc534f. 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/PEBQ91503103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2115ca3f8d6d2ff49161080a26a388e2befc90ac6a13620820d1c1f4f5360aac. 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/MXG381900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236ef4d1dd93d127ea2cc0f36db08c28f13a905015cebcf767d0b273a09fa8df. 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/PEBQ91611572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d698506295a9ab55002a2e0c7ff36bb9287a51d6b01f032673a81686abb9740. 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/USA2P1400261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1ba3a93c1ea7a39602b3ce18bc7145efd365674f8accf4c08ccabb0c29593e. 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/USA2P1400262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31bc38abe75d82a816ee3c7b51d40faf75c0e445f3c498e7f6aaf4cab20e541. 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/USA2P1400263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf6b07237ec4bd41c871ed1ee046bdc0529a085c4262dc77883052438451474. 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/ES71G1634188.