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 0x016b4a55df46fffbadee9faf22b5c71f882737021397d6f06f5ee52ac4e14921. Chain 2 (Bitcoin): anchored in block 954035 (2026-06-17T02:39:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d57e552-852a-4f69-a2ec-85a7a8b7a9ff.json and https://artists.proofprofile.net/proofs/artist/3d57e552-852a-4f69-a2ec-85a7a8b7a9ff.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 0xbb753c2eaaff1d46ffd1b5215362cdc645beaaf9b139c2b4394887f4a49f9270. 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/BXIW82000076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3c3d9c14de90602d38b06d2e3a84aa3a5657d117326b3a1b19543045aba1fa. 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/BXIW82000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bef5172947972c42116d2e83ddffbfb08da10cdcc75ffbbb32b6ebe3b74bb6. 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/BXIW82000078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de7bf2c4aac452a60e6f7f75c74d7b0f54356249864d5b7b40d0ae41242f8ad. 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/BXIW82000079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593abeb4510a29edd0052dcbbe05b5f4ed601c739fb7c2409cbe3a6f2f3aff0e. 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/BXIW82000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60ec4dce367a617510535644ab26765b96b7db7769fb09a50ce2c126359c860. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/BXIW82000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b70d8b1b48abda8578969730a51d43dab93ad3193c329b38cc7bcd4e1741218. 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/BXIW82000082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e51ec748721c8b39564f66b816db78be13e65c8cdf9f16cad1a27a5780c3c7d. 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/BXIW82000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416d3480c2fe8fd8b2fc41f38fddcf32239f70a841acd7331c23988aea45bdb6. 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/BXIW82000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726738a1fbaf757275a6977fccd57d7507e08d0b448bad1af38d17bf436c931e. 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/BXIW82000087.