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 0x9b63d023a8c788a47910feced6724f8552fac80229b7c51c0b17c208ff774d38. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd047f6c-ef20-4129-a5bf-a70b062e209b.json and https://artists.proofprofile.net/proofs/artist/cd047f6c-ef20-4129-a5bf-a70b062e209b.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 0xea42ae9a8596e7a681e8d083042eb18c4b9ccff4f48354cf99632cca97842654. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:07:58Z), 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/DEU970600583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424fe6c189001552e37dd5d1db444ddb8cabd140038a7284b418b7e50d4e11a5. 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/DEU970600588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465162e6907946fffb3b8eebad3af41930ba484718794171fdb7ddc9e9b6ca57. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/DEU970600627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d25471e5cad9a78748996567abb0cf262583f95494bbcf0653a5930b4551e2d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEU970600633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6352189fe06c9b303cc0086791533b2c7d62d596c58b9eb151a07042837000d5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEU970600649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cf7fcd10e6b40139b2e37c33f6de5f6dce201cf7ddc32fee2a70f2bed4e3a8. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEBE41800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3318aa1ff3a31520d7cb5e925847ae648ce1477eba5ade556cae9ef847e4526. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:28:15Z), 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/DEBE41900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe63b3f3eb589539295ad1df8c6e6748775ec87900b4126b70920a82c73bcee. 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/DEBE42100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8a31c903df5c5ccfd03c9af78c5808a22d94e87cbaf4280ed3e922162ddbd0. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:03:27Z), 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/DEBE42100036.