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 0x8b9d5b6f18d7ad41c3a65fbc195f0759b8d2e8c7affc962a0b8f910e45b20900. 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/81ff89dc-1bb0-4bb8-843a-14e9cc6a96a0.json and https://artists.proofprofile.net/proofs/artist/81ff89dc-1bb0-4bb8-843a-14e9cc6a96a0.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 0xfa2b1ec9c203b8bd40bd130f6d7d8a32f66965a04f48e0f9bf1c7833becf733a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:55:46Z), 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/ES71G1503541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334e7d77e930055385779231b752a3951d3327754d3aaabb27b651fdef482a9b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:16:48Z), 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/ES71G1503542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40410353cc20fbfbdd1322e8449cea7f3818e433dfdd8dd99d9cf2c96284c84c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES71G1503543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152b2e3cabe2da914a225e4690337f9f496297b4fc0354454b575a7c85cab988. 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/ES71G1503546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e03c7e8c6133e945f1857f8be848b65a343a74dd1e168e917441f64c81bd74. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/EST1G1712668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd0789981da55f89429d4dc0182f1883687c1241c740554c6046d2bcc060766. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/EST1G1712672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605b275f08c493e415bbf30fbe1a7dd44ef3f4e01778dad82eb27e0e54df44b8. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:07:10Z), 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/EST1G1712677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0759472215f66c5822965c833fd27d08eab7aaf1dae30a233834f2ce63721ce5. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/MXD781902473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe933875bd4f48b70b017f99a087f809899aeee7c1402e0eb973347734afb6bd3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZGLM2517714.