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 0xb6ebaa43a8c31d12b7cc28c684bdf0e4f30f3a7f6d86644e60bb04b9bf3fc0f2. 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/b03cf6a9-5553-418e-a4bb-3f26b9f6fd36.json and https://artists.proofprofile.net/proofs/artist/b03cf6a9-5553-418e-a4bb-3f26b9f6fd36.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 0x62b0d6b30a24a9b83507d6115b1b30fb7991585440043ba7edca0a0dda35f059. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USDY42443623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29ebe5745fd3ccf9aa6a09f425f32e4caee2875187be4cacb5dd18d87771b4e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USCGH2591312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ce4e7064f76fe295a95f2decc525623682e10a37d9f2d34a12e0e03e2c7cd0. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/USCGH2591313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0782c45ad1df94c66fc47c67c07577698f928ef07ec6117702d17fd2098c85. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:26:10Z), 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/USCGH2591314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be6edaea7addc11b73a40d7f12748f16e29d59216c29c18122021b578508d12. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USCGH2591316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845333d6e0eeeb1c75857782735c02b615e99b4b8214349f9946053ecab92d89. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:22:03Z), 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/USCGJ2571263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fe9abb289329322e6d4a8674cfa188a89d3cf4ede72cb1369c0f427f22ad08. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGJ2571265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b6b127fd9502d438095f0399aa7be915a9f856671491d5325b093ef9bd761b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USCGJ2571268.