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 0x06406c189d1984ad7c97d9f14a0a91275dfcd8117c365ef8d49f8827497843fc. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77ab4289-f12e-4264-b202-c06378547d7f.json and https://artists.proofprofile.net/proofs/artist/77ab4289-f12e-4264-b202-c06378547d7f.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 0xb64f72a9a78ba03706d8a32c82ebb57264f1a92fa8e3d5f045f94c14f795b5b6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAHX2499409.
Cama De Goyo/ Cuando Volverás/ Sincero Amor (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c716c676bbf2608de0fc8078aa5ed64bde9e87c86232f04d0f4aa6340eeae9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAHY2450461.
Macorina / El Bailador / El Farolito / Guapacha
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb167d979f5c18c45e2399b971e7f848031dfcdd78c3500dde3306cd7d5e4ee8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTPX2459759.
Julia / El Burro Loco / Las Amarillas / La San Marqueña
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b34ba4ca620f131ec16288d113f2aef508b4a1573968b1629f18c00a73c1dd. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZTPX2459761.
Cuando Volverás / Sincero Amor / María Teresa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53f01dadc3a79cbc1a9bb679d641a6e82e9840a7f5dcb8287ca3e86bbd5708c. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZTPX2459767.
Mambo No 8 / Mambo Lupita / Pa' Delante Pa' Tras / El Gusano
Julia / La Yaquesita / El Estropajo / El Pescuezo Retorcido
Popurrí Bailador: El Bailador / El Farolito / Guapacha
Popurrí Luz Roja: Cuando Volverás / Sincero Amor
Se Me Perdió la Cadenita / Capullo y Sorullo / Mil Horas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c76ce0ebcafbf664731b41039fec34262905da46091eb4f306f8bf0e070438. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNJW2557517.