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 0x5cf42b8a350e3240e82a7406f981b6432a1e392abb683c4526356cd22903e3d7. 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/516e1071-40ba-4610-b9f5-dbe489c1c5ac.json and https://artists.proofprofile.net/proofs/artist/516e1071-40ba-4610-b9f5-dbe489c1c5ac.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 0x5090fe183f28b6d484d425cd73699248777f00c6825f329560eed8f575e00a05. 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/CAZ709300151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bf1db544352e5a080832e3891d2d4f962a53bcac05b7353cd78b4ae4b2f2e8. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CAZ709300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b86f8f98f5c30584268385b44e13b421b77cdf3ee2e161d26234a42d411a4a8. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/CAZ700000833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf271b9c55f0b28d7c8de968048e2433cb57c5ac16640d98f083db705d5004673. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAZ700000834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f617017bd3004bdccf0ecb9ba64460248e53bcc6dcf65aa5ebfce0f69277c7. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:56:17Z), 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/CAZ700000837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339a20c5400cca50c50fe7b9a2273e2dfdeaa9ed1e5fe14aabb293612f15c65b. 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/CAZ700000838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783d5bb842a59c6896fc209c4b934ef0e27b7bb478822f6f4919255377ca6708. 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/CAZ700000839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf2611a73194d1552ed88cbd902c069dc4b5bb17d4e8736d1a63a55ffee1ef8. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/CAZ700000700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe097ae23587509b5525028603710fa68434fbebca719c899023c8a558e268632. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CAZ700000595.
Claude Valade - Collection Country (Remasterisé)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe4dc738913d1e21747ba21d1d1ce91a4d9f285fbf11757d073e739e9b11e32. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CAZ709500021.