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 0xfe88c4a3d834a1bcce16a4eabc0b5bfc86c4e381c3378e3a0b334ed02800a165. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73c14abb-826d-4ca4-a842-a9e981e4c672.json and https://artists.proofprofile.net/proofs/artist/73c14abb-826d-4ca4-a842-a9e981e4c672.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 0x950bc32b8b1761d61539155f3304a7c026932d66e93fc39a05e4ee337c157609. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZGLM2582271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9f1c8da34dee6cf83b2604235b81658c67fc8bbc34c018afabcf896d19ac2e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZGLM2582272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e6d463c4512a6eae8054a71687023b5ebd1ab3371a169e70cd470221b6162f. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZGLM2582273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ce19dcadc7e479dc673ea75fc8c5e3e74f89512a83b855ef446768734352a6. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZGLM2582274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf33945c36ddf158de91fde4824129290f43dd9d847a496d9b81a69290293cf8. 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/QZGLM2582275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de39f392784bb8934d03e47e9c979e2efe7daa3e9b3e1b9728d788630138c5a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:14:04Z), 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/QZGLM2582276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44a9a66c0847358e75ceb118e0b2ef10c73bb4c5f81631b1957fc5a69ba8b04. 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/QZGLM2582277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e23dcf1111266cb7de1af1d9c457815c733d339e29d1a6d75864410415df812. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGLM2582278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a949539419e9df9c27600fd85c489953be0ad2537500ea7c6e0e5f5c3759d01. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZGLM2582279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fc7595be7c6a68d7dcb3dfc05fca148c146cf1088509a4fc58e3316f98c484. 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/QZGLM2582280.