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 0x13eefdeabd420b6545242e2b19f9340d131f625758da14e3b809800830dd05d8. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6ef7360-0512-4298-a15a-ae9ad240e4bd.json and https://artists.proofprofile.net/proofs/artist/f6ef7360-0512-4298-a15a-ae9ad240e4bd.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 0x98fa404c9701117795bc536de28b57d637fa4735c684a2b53011874b79405e04. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:36:23Z), 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/BRKDO1400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a87fa8c830b1c4993c285d8ba470617ba0c3d1569ba796c3dd7519e81e7d9d8. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/BRKDO1400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535220738c1ed188093d27730d31483875a447bda674f4f8d773ad170b51805e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:45:55Z), 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/BXHQF1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e37055623769cbfb3785ff992185ff26716af84b4f4a01a5e8318fa292b6d6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BXHQF2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ade8e8509900471f6945e01fc9901252228b0ab6a52b86a4ed63b557562999. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/BXHQF2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbba50e2af2d15d3034a284a6b96c31fac7885a493ee562e737b9a2a1ca552a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BXHQF2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3972425a83aba5e3719fdbad054c50bbeba148936daf5eb46aaa77805e597ce. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXHQF2100005.