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 0xcc905cae11246624d5b216f53ed703a29faa67b96a0326988111fe4a2fce0ac1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a17cc8d-7a6f-432a-8eb0-552503f23cda.json and https://artists.proofprofile.net/proofs/artist/9a17cc8d-7a6f-432a-8eb0-552503f23cda.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 0xcc80de6dcf287d6c498f55de27cca80b7e330e49a16907f23897435187e8edc6. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:47:51Z), 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/QZZ7U2515104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828b4ade31b5d2a96c0fa3f2ada7cdd59a459ffdb3c56ee5d9698a62593c3af3. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:03:59Z), 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/QZZ7U2515105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe324004d635a3f1e96e31b2545fd6966692fcd9c03de72cb7e9ad3addcc13b85. 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/QZZ7U2515106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7715f2a55a4b29f531b1a9786c02fad31dae3e9b960915c15b6fb0e04e5359a9. 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/QZZ7U2515107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bad0a0f95f304c0f333df7fe2a55d5c6cca85da7e5c4f1cb3e1a706ba02f32. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:30:25Z), 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/QZZ7U2515108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197b1abdaa7c824782b807145aa383e39f314e52ea9fa95f3a3a454488b41ca6. 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/QZZ7U2515109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1887e35f8b5d1ac08340bc7b499397efba75b04cc8b6a11f5ac67fe1536b669. 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/QZZ7U2515110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102d6c2472f68fc1a512cf78f12bd01960a10395028ca28979f72b1e142c00c4. 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/QZZ7U2515111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce15cc194c66d3142e0440da077931f5c25a65e2f3b35ea6d71dae26089d47a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ7U2515113.