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 0x7c83459e85cc3466467b6078ecc1479bf263ee89cce62630eb487752326a29b0. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2cbca6a-25a6-4692-85a4-46e273bb3c0e.json and https://artists.proofprofile.net/proofs/artist/c2cbca6a-25a6-4692-85a4-46e273bb3c0e.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 0xb8446a829fa78748feeae99a4a37cd2aa934e088f22062261ff840b248ab8f56. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QM4TW2566056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91f6775d06809190effec127c7e864ecaa28839b5e6dca7b37fb71aad7371ef. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:44:19Z), 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/QM4TW2566057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97a0c694441d13345e4261f029d1885e455cd6a7068d66afa2285d7af7d9ab5. 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/QM4TW2566058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fe062bc872383c2517b7b0aa0bab356895c7c6545b46a7ef7495ca21a243c9. 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/QM4TW2566059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc4248ade2fb84acecc5c222e3c87fcb286f4b41b9841976c13ddd43a362937. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:28:18Z), 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/QM4TW2566060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4465ade91a44c18ca1fbe87d33c4ca525c4530dac9b73333aa1c86d617e1897d. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:19:59Z), 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/QM4TW2566061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba3eb2f1f5e2cc188361d0b93bf3743dd906972421b8162c0ad7cd47c8f8b54. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM4TW2566062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5470687ef86a63d4ac6b53fc1b23eedf844cb90c639028f6ec6090f4f32746b7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QM4TW2566064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2587ee9dbd9602217f74d75efd4e04e99d8c3e60387422014057630b426e61ea. 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/QM4TW2566065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5966b9d4319d551d49d3875564975021b9a57d97dadef834e04ba55a6f72265. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QM4TW2566066.