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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352d52b19e4007adf9cbda4296b54c753edb0395b8482a614aba1e910f0d35d6. 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/a2108876-81e1-44d5-8022-9c4db1535aab.json and https://artists.proofprofile.net/proofs/artist/a2108876-81e1-44d5-8022-9c4db1535aab.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521ff44cefbdf46ce33ee925cd64e09d50a37e8b4bff71a287f6131f68515792. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSD11400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8090ca8cf91fb981dce45c870432244a1c0d2952f5775c950e3344c840e42e6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TX2334379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29915510c846a37f2e7992ab9489c61bb9d6f33d342ce84d988bf3acd1a95efd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/MXF012100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3748bf940e4a25128a011efb2c488ac2b58d541b21b27fe63caa178e1b14a992. 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/MXF012200419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8293cc39132518f5e26f1d7524ef26cea197e59e19a3948818b37f69c2bd130a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES5152200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7adf09b66d55daadff4271e494a7db1c8a36e908ecec7778194737c8266e13. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/COSO12000153.
Sé Que Te Vas (feat. Matisse) - HA-ASH Primera Fila - Hecho Realidad [En Vivo]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af816c13d94ea101f7b3f3135b6f486876628d845e338b7b7d8cbb3c8ac671c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXF011400343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad304d6dfa91e593a19450396095c1399c18073ef6794ddd82e7013dcc3e265. 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/MXF012301094.
Flotando (feat. Matisse) - El Viaje de Matisse
Flotando (feat. Matisse) [El Viaje de Matisse]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7b611e1b18aaf6dd22d632abb521c1ddf74579ff9ee05e69c72580378678cd. 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/CLPP22000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa40c711179e9a7f0c2e9432be3ba5a79e37faa3568849df0a9e5d733fe11a5. 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/MXF011900286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3f217457b73db4df4ff4e415852a06339c32e0e5e896ca626f5899de2ffe10. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/MXF011900274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa40c711179e9a7f0c2e9432be3ba5a79e37faa3568849df0a9e5d733fe11a5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXF011900286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367f6d692b5792949e37eb24bb16318875b006e8d453bb0a3d88c0a235631c68. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXF011900312.
Borrar y Continuar (with Matisse) - En Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb5416bef1d3711dd853ba70fe42eea513bc0d7a8b8df327a9d0c5766e9d707. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/MXF011400431.
30 Horas (feat. Matisse) - El Viaje de Matisse
30 Horas (feat. Matisse) [El Viaje de Matisse]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f604be3a8433705538701bcef9abbec4f2129104d677eaac76059e01820f53. 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/MXF012000104.
Primer Avión (feat. Ezio Oliva) - El Viaje de Matisse
Primer Avión (feat. Ezio Oliva) [El Viaje de Matisse]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9029cb58fce4714357154e027674118f9591def14f27a8e1573272f1e56b52. 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/MXF012000092.