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 0xa95d6123db47948a1291208d8a448cc5f771e0761727edee675f6b4272dd1279. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29d3985d-9f05-4def-ad94-3f10a8e5bb9e.json and https://artists.proofprofile.net/proofs/artist/29d3985d-9f05-4def-ad94-3f10a8e5bb9e.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 0xb2d3263aa4e82937789ad528569544ff6250b7ef32e20bb61be595333dce9351. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BRWMB0000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbe9c80aa4476d850f7d05febe33139bda1e0f17fd193ae6966977059d829e4. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:55:31Z), 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/BRWMB0000088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d2ec44cd00e42e993b258e215ef3160c81b3115cfe92f3a994647ce89dbe33. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BRWMB9700723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e411f8744de6495190ad2d6a6798a94068a559081e077d55d622bc572479ef. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:01:31Z), 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/BRWMB9700724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95284a56e7b39fbe848f91d44b1c628320da0cece43177259ac74533d012aee. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/BRWMB9700726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc945642181f0fd1b50c592e71b3d1f9ac23eb4993f84429b96d256efe3f8a1e3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BRWMB9700728.