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 0x6674487bd408ab14ab07e18767220518d7e77d55c6cc9c4423ed705d81be12eb. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71c2ca20-4528-420f-9892-2bfb2c29694c.json and https://artists.proofprofile.net/proofs/artist/71c2ca20-4528-420f-9892-2bfb2c29694c.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 0x45615b7252a3f3276715ee374c7037cc28b977bef0925ee7f0b4becc7feee9cc. 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/KRA532301079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede66251cc0078ad0d26e3aa00f9edf932bb251a6a2d9cad11cc10439720d61e. 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/KRA532401146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110219d965c6060203853c5896ce63e905d911719e1d5a4564b92215cc3d9504. 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/KRA532401148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8650b84af07cc98afb5b89163606fe300c189bc0d319dbfb57933cc08facd3b4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/KRA532401149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93962be7fc00b6dfe4bde47ba5ebc2ceb219828d881dae98667ab76c8160679. 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/KRA532401150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e37bc9e8e1ea4c805100e84885b5cefb14ac6cfeadae45645d58c046fe12e4. 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/KRA252402929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c7f749e108c2a7f71e746ae963590574cd8ba41a00e6fcc1ec90684669a043. 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/KRA252500426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5a17d5100a4ba00a8379b14ba5d6711e39ae1caeea477651097226db1c739d. 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/KRA252500905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9d20cf1a5db087d3890c2eaff29b382afa74e4d3b0cbe85bb879746b1067d8. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:36:05Z), 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/KRA252501155.