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 0x8a1427d3c2f174a84aafba300a51c086090aac3f4d7050d665e0a7f3893b0643. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65f94eb1-7953-4787-858d-862fd644f1ad.json and https://artists.proofprofile.net/proofs/artist/65f94eb1-7953-4787-858d-862fd644f1ad.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 0xf3907eae230f6a75e104b5d3cb9f4268b61c93b1f88596497a4899ab9c36af1e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZRP42376739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78765037cbfdf63394e97a77a12103898b2b309189f2b6d268e521edbfc9a64. 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/QZRP52316726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1206198ea9a335132330c4ceecb9834345d6d9f0c3f34f03c74f2bcce83f4775. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:07:04Z), 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/QZTAT2388640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aeeddaee61ff9f3094812e676bba6e3a727a00dd8a686d633b2539da0c603f0. 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/QZK6F2526362.
Zamba Del Carnaval - En Directo En La Voz / 2021
La Voz 2021 (Knockouts – Episodio 2 / En Directo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf279e2c8f4146596b29702c864aab3ef707bb9e37ffb2488b21b6ace5540bde7. 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/ARF362100229.
Rayando El Sol - En Directo En La Voz / 2021
La Voz 2021 (Audiciones a ciegas – Episodio 1 / En Directo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04671a6100c4d0e6e717ba5a0386220dcf13b0d32737235f3f2d7d5456813033. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ARF362100071.
Canción De Las Simples Cosas - En Directo En La Voz / 2021
La Voz 2021 (Semifinal – Episodio 2 / En Directo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6faf2cdcf44e453203f7edc002a98f5bdf9674d8c228da94d8f622044c3e049. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ARF362100361.