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 0xd9e02c3b181cb8736ad12e0e3915fc859b75be91dc637ce8f522e897ee2325ae. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10fd7ce9-69a8-4d7d-8b21-637e5ccb58cc.json and https://artists.proofprofile.net/proofs/artist/10fd7ce9-69a8-4d7d-8b21-637e5ccb58cc.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 0x2b0a00614c7dd868604855b9fa1f6e2d014b812889bd1dcb06075b628b11ed2d. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:29:23Z), 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/GBKQU2363494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ad711241fcb5882a3883309b970138c256d0088fb7632f95d6e7886fd5def5. 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/GBKQU2363666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a0669531e94552f70a452e87f7413876ddd33ea544b07a5348cd11fb5da69a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBLV62306832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a0669531e94552f70a452e87f7413876ddd33ea544b07a5348cd11fb5da69a. 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/GBLV62306832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7eda55cb0c67de52a4292ea3dd31622fe5195067de1a042f39ee85cb72a6b2. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/GBLV62306833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3cfac6e25a9f3c3592871b80a17cd5f70e594f9bb801b3cb2d9f71b6c745fb. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:26:48Z), 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/GBKQU2424676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3cfac6e25a9f3c3592871b80a17cd5f70e594f9bb801b3cb2d9f71b6c745fb. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:47:32Z), 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/GBKQU2424676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb456524a93254d7be66376cfe89261e2b9efb1e448350eea04a4d770f445d1fd. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QM4TX2596202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90387ce387e63d88a3cc28253399cfcf70c6caac6f669f729eff9a3ea781d86b. 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/QM4TX2596210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80583597c8b4b993e455a4229ebe49df0468ffcc3e1e0f6d4973feb4df9a4d23. 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/QM4TX2596211.