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 0x70e39facce0178ffccce54a94478a009f654f7cf2971b26881a391952dec28ce. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bdc6ebe0-43a7-4e97-a277-c8cf53c30c6f.json and https://artists.proofprofile.net/proofs/artist/bdc6ebe0-43a7-4e97-a277-c8cf53c30c6f.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 0x1ec0ff418055e9a60601ff78cbd60d3dd152bc6661fef5ab1d1b81782eea0f17. 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/DGA062481946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca2c4bd8f06ab00c236c888a6acf3b705bd18464cc8566f461cf0025ebc6524. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/DGA062481947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf929599b196ddc7f408d1f559b587adfbd28cae99e54178113568dbd9222b321. 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/DGA062481952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c820b63bfe07a4975492e2413161b70b151c395c5f2a2f4e4d24b1af3a35468. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DGA062481954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981df904129ca31c6834ed50837755b5ebc3bca73e3b5f2ccdf09ce3cfc2c992. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:07:52Z), 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/DGA0S2411247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23983786b13882e0c650b260c5240f64e5b53b84e97843070ddc3f032bba772. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FR2X42563832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a778acab4a7002c4301f879a164b93251d17ede648c67f85f5af4f82f593004. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR2X42563834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c63affda2c55ea7e519adf7a04e6fb87bafcd73d3e4609ae4f66e16796b2d0a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RUAGW2504699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c63affda2c55ea7e519adf7a04e6fb87bafcd73d3e4609ae4f66e16796b2d0a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/RUAGW2504699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783f48ffdd6d9142c95ec529bb0e331c80f305d53f07b7fe0ab12607b921edef. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/RUAGW2507224.