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 0x70f393fee485f71508deefddb0c9d122f320d540da5577ae7e201bbcae885540. 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/2e872229-7fb8-4941-a0ef-553c686a7f9e.json and https://artists.proofprofile.net/proofs/artist/2e872229-7fb8-4941-a0ef-553c686a7f9e.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 0x67214c659094a9560b0b134e4fa170cea163dd60d97708b4be7f83e83afe948d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:34:14Z), 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/DGA062229006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ea751c0baafb97f0632ee18eb0618a56a9ee1995abd75e4135e9f6ed5313c0. 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/FRX202308516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743f350746426dc93aa687c3cb8332500d55181f89bf27d50672926ca8ff2dd2. 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/DEZC62494147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6772b7d8fb142264fd1119587003d6e875ade2671655f6de11a3d7a6f0411c0e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:01:28Z), 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/DEZC62413583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20ea59ba394cb800ed7478a26941e22da367812e1619ec301afd140f1089bf3. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:17:59Z), 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/DEZC62589011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf300718e9c1df402fb9b8addd18c0a9b365857775cb53254bf90fdecd81e11af. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/DEZC62589012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6200f28262ad400fb5587fcdf50735351930c369db3c0c27c2b399146d705c38. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/FRX872511912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefdb294a99143e362fa9db33e4fc177765ad6552c94c584ebfa3f367548e348. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEKF22401204.