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 0x21c5f5ec79aeab807e76ef1cb6a3836e15f7aa180ea130c6bd414e8fc6229fa1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8eea81c8-5722-45e0-b82d-9e4788cc3fc6.json and https://artists.proofprofile.net/proofs/artist/8eea81c8-5722-45e0-b82d-9e4788cc3fc6.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 0x64fc6911c6702fae23187343b7cbfbce8c801f78c48a68d97c67d51ad0d3c153. 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/ARF061501262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f36b2a0f35e9a24b3ca9745f20125601488e2fe43ae34040b68f070f5066bb0. 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/ARF061501264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a1b74c481b4e94d39fbd6c768b79204d7600f5a8c6b7aa759af9d4de5b8e7b. 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/MX4972140440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89f094bc1cfaa28bc1f50f98237af6735a95a094c67584ca70c81768f9cf7e9. 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/MX4972140445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20ad771ebe82b78c9670aad04f728694e50732142dc5ece5da788c445e2cb00. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/MX4972140446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb41cbf654cba1a37b111864207e29f2318047f1c4c56b75258b501d4aae491. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/MX4972140453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3caf60aab5ca52eea18d83b5cfb67dbf0b9e76fd8319e8598fa2a41f3a29651f. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/ARDL12400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13af035ce72a65af3392771a6bf4ddf2f4a07c3ee2a6aa7e91c47187e563eaa. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ARDL12400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025c963e49e2a83fa2a34380dc04845bc0d2baa01f4b081fe15e3f89a6a728bc. 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/ARDL12400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd16790655649aa17af49c4154137fdf4fcb34bb78133a27a4eb35a6bc487fa. 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/ARDL12400099.