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 0x1e76c3683fd14433d696a19c82751668de88cf8efe23319e9185433aef90aa4a. 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/ba2d2edc-6222-4b30-993d-cfbbf6b9580b.json and https://artists.proofprofile.net/proofs/artist/ba2d2edc-6222-4b30-993d-cfbbf6b9580b.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 0xeb9376079d4241ea0c2017538a0314e0897af464e59730b3906ba70a47eba51b. 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/QZMEM2410479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa3e13bd0d566f25365210cf9217b8ef8e6e69eb12170e078a0850aa0f4b751. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFU2420466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06db8f9397e9de9bb120956d540645ec214a55f9d02c9b35d10809a4fbe7db2e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZZ7M2419001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d791bec74e181c4ba82a7879904a759ef26a505337f377260e3d90f3479cdd2. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZNWW2595403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225ac290dbd4a165c46f03be6d1bc64e87f446c5de1a12c7bdbd4c2d59639bc6. 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/QZTAX2577740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c7e4390c458aabb767ddcc37a9f2aa1febcb0d0e06fa7028689b9a6af5360b. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZTAX2577741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4835affd640cb21b46889969b80c130aa62416fe99f9c868ae8117a69a3c266b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:21:36Z), 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/QZTAX2577742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a4901dcde34b8b63abc1ca5d5176636593894892ace787b5b32cdc06bb5529. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:31:07Z), 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/QZTAX2577747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5bcbc4b6385257ce954c1c4c5eab01607a5d99f8c2b5cbdaf5c68a3aa163db. 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/QZTAX2577750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf641d5c4b6a015a163028dc7a427666fb44a26c898f965965608ef217c29a1f3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QT3FF2524381.