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 0xadacd2f2eaf182cd3f930028829038694fa482ebf7373305a9e542ae88203f6c. 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/af89a139-c1cb-4252-8f6f-916adbe6ac8b.json and https://artists.proofprofile.net/proofs/artist/af89a139-c1cb-4252-8f6f-916adbe6ac8b.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 0x0fd4e71048a46b01b3223832b25447b37e48284b5d24c1cc73d4c0d90b3a8e12. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GX3HH2528157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41796684aa8b117e58749e4a5c0dbf770e3252f66e5a8a1ecedfd1a07a977ae7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GX3HH2504875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8439028266233a642d79208b257bfc14575172c281042e5991d081cf1df865. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GX3HH2576483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032859e3389eee330b3085c147461c5f93d013b34addb03a1c986a4c654e611a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX3HH2516793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24cce5bdfe151cb6c3357dbde6cf8206492b3fd1d5c6d6b002cd9c774dd00ee. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:50:00Z), 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/GX3HH2544864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac42b2174ee649d36c9f85aeee67711aad6f6ba8e84ef387c08c62ad5b3149b1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX3HH2560790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07db1c4c9d047d956b5a4f3e0e03b30c1b5801f5bc184cd9a10d1b7b09b7e09a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/GX3HH2537237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b53d41cc721c7f78cf9c300708a146028699104b4ed9d8e805c8c0983100973. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GXF972524051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b91af4735bb323c9ea00bee82b985424089a89cc63c8d8796235b9f374e5d6f. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/GXF972575980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26321dbc35b3cea90d25809032dc569b8e3d5d2f45c3408c0b022568bf806cde. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GXF972540445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dad1b75937bb3cb0301e864414412e29882c9ca25363a1025f9a972d6cba335. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXF972569208.