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 0xf971b8c71f26abb965daaa402223190a870b5be38edaa0fed663d414abfc0a00. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdc4287f-6e72-4909-8d70-20ec572eed53.json and https://artists.proofprofile.net/proofs/artist/cdc4287f-6e72-4909-8d70-20ec572eed53.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 0xc5c03bb614b7b9d8f2925fe6871dc54931304de5116c7c14b685793d6459e261. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRY397513906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1f3129e658c3ae0ae216d19f6be7499c455a55287cabb869cfd77f2dbdc550. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRY397513907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7a66d17abe93801329e2d4a27e40e9dd2644d0f1a8a483802859e1248b7ce5. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:32:12Z), 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/FRY397513908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2978fff82ecf473d346091f5320efba85b665c98ae5f1d30ae7002e2f6a2d22. 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/FRY397513910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd06b67ab487f73db7ca7718566211c8e37bbb3516e782eae1ce358dc45a8a3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/FRY397513911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe895cf811552f3736734efb88971f7e1853c53554eaaa489c628180b783d70d8. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FRY397513912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60a5bf8ea0d591b8db624713e3bc98cb8b99e9408a649a2d0fe84872e833fde. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:31:09Z), 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/FRY397513913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe147205394655451a9825f0e3dee4bd9a33bf32e575f3fa4e727b56b450588. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FRY397513914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198fa7bc564a9cee9cd71c5c7c767ab138b3750a93f4232ff192b7810433ec91. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T03:25:44Z), 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/FRY397513915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec9268bc819d1694b0cc30b80fa3df2c729428d9d1a0aadf22fe5a12ea3a01d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FRY397313918.