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 0xb5a147c978440efe145eb6cc1ef0f87f9f4fb6b5b05b6bd21157e00770b3e7d7. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3290305-1576-41ef-85b5-06370b3290ef.json and https://artists.proofprofile.net/proofs/artist/c3290305-1576-41ef-85b5-06370b3290ef.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 0x718ff765e67ec54415b212632b6b859cce16c71820307d2f65798fd1805d8647. 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/USPKE1900182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10836e61afd3f7a0bbb35f0baa1d708d1546ed1e23864f3eceed89d654c4401. 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/USPKE1900183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528be3ce3a0b316e449fac157893b98e0804dd5e04bf4c9ba9be58c21bfb5b03. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USPKE1900184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fadeaff17ab856e8ee166b9da63022f1b1217dbce185f58c8aad80f7c74660. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:53:36Z), 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/USPKE2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377ead5d7316507cde67ef39b8ea201458315cb80633076004c8df952547b911. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USPKE2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d0a34ce20727ef01da99b92152c2ddfce939a43c434f3542844b17b82003c4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USPKE2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37767b1afa1fcb9ddf3e2943ed2790ccfe98225230e63ef863977a304f3d5365. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USPKE2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e7ca15a8408b241fc20a5a227e8d78c6c779139bb089cc0e0a5f4ed779198a. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:46:31Z), 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/USPKE2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b712155b1e62ae6b05ce8efc52d7923f52badddd647932527036d673a5e94c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USPKE2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72451f73e9af3f0709fd954310b7fb2ea801e05db3a5b2615d233fb07396271. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:01:05Z), 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/USPKE2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2899eedeb897f8c86a0f2639d7eb222c5fd2919d231ed5f55bbb8d8f5969cc73. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USPKE2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0bb74b6853b0f4cf9deddb02395a0e0f0246f931e83a5cb90cecf788da88b6. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USPKE2300021.