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 0xa4243765f1c2a530f2082181b66177113eb3039f02d15d5dab7130a35c44694e. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8735f11b-8ecf-4672-8393-73bdbe5f1d7a.json and https://artists.proofprofile.net/proofs/artist/8735f11b-8ecf-4672-8393-73bdbe5f1d7a.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 0xcf05493ccf817aca2d1b333610c3882b65c6a6508b91fbe7ee8a1730532c8ead. 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/PT6IU2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b14b2a33216b78006d3bb4f4f6997c0dd5abf731e5532e110e930108f5612a. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/PT6IU2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ea9bf545159461193b4018f25d439cce5a70c31b17aa41d1c7ebf0c34872c8. 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/PT6IU2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018e214647cc3f992f345ce666399057d887c9264b69f5c22b6b7281a2f2b6f9. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:18:58Z), 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/PT6IU2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c60efe9f23f9069febef13215c0edbea2849567d8a977f9824edf5074dce819. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/PT6IU2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeebc17336098a64df1586e566d223d985e412479ffd4d289d65f2bdf4662689. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:32:34Z), 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/PT6IU2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21067fc81f3597f8970677148b7f12a8e207a135e3bc50d9bf83fc836a72bca. 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/PT6IU2300017.
Cada x + Perto (feat. Rão Kyao, RAISSA & Rubi Machado)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dcca6ede205c9a43e8fa2dbf1a9adcd79c0fbad132ce8a1cd4381199b5a6a9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PT6IU2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21067fc81f3597f8970677148b7f12a8e207a135e3bc50d9bf83fc836a72bca. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PT6IU2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dcca6ede205c9a43e8fa2dbf1a9adcd79c0fbad132ce8a1cd4381199b5a6a9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PT6IU2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06b9bb026b1bb4d9b780c9f5a934e9d651b60d93249f9ec038ed70c53bfca02. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PT6IU2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901e1722c86b48894756c3614c06bf05ee07757735c8ac3bf933d2846ce293b0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PT6IU2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3fc59eeb925a5d6d743ebe83cc2bc20c21107e15caf584a57bf474ddbfa4db. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PT6IU2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e7cfacd7a6bc7c053f92ffe0f32773e4a2c0b536464bd08331ba17f3b82d4d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PT6IU2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169f0e65e95904a2aee2d2bb315a581ab53c710d59faa641a730c33cbb05c828. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/PT6IU2500001.