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 0x2be3205ae7075a78049bb7ba0427ed946aca106bb244219905b485864af87043. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e760afda-ba5a-4ddd-9dc1-028fdf661c47.json and https://artists.proofprofile.net/proofs/artist/e760afda-ba5a-4ddd-9dc1-028fdf661c47.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 0x6b6b0a59b363af54ce3f8b99a05afc1c1b2d1488fbd3b33b145f175a286afa8f. 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/AR8L71300356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1755685e32747d3959537511540bc6826cb77419a88ded1409903a3b4a050b7. 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/AR8L71300357.
Dios en Tus Ojos / Como / Amnesia / Algo Contigo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16acebe032084da93462520e37cc593202d109f395cb6c03d267f0f27932a2ec. 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/AR8L71300358.
Sabor a Mi / Tu Me Acostumbraste / Contigo a la Distancia / Frenesí
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dadc35d2479a977e8b7693faeeb9a9b23031a9e94a5edc7f671f01e99bed84c. 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/AR8L71300359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1840fd39c95a309572bb34a38d03c22260e6109eb6386f378fcdfb722a9c71. 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/AR8L71300360.
El Reloj / La Barca / Regalame Esta Noche
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c589587e59cbeb427a6b50b3c0b9cb0b3d8551da05dbf4c1a0a2b955e411021. 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/AR8L71300362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e31007916ada580bcf3513e55eed11baa9933703f37d752605c969474ceecf. 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/AR8L71300364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bbc8219249086c7ae589d6866f1027d30daf10338e9faca233dd618e71efa3. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/AR8L71300366.
Mi Carta / Somos / Quisiera Ser / Abrázame Así
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964f54bf80ced5b31aaf7ec7ec19d992cf70466fac26f466e05bbe9165b00c9a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/AR8L71300367.
Juguete / Una Aventura Más / No Te Importe Saber / Quiereme Mucho
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1060c01b91fa0e1c44749558c83fe1828e8e0d6491dc862ad2eb372230c22b. 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/AR8L71300368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8520c1ef7b898f973ccc337a094dee71db6a6b9fa0ee35c0690ff0ae16e0185. 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/AR8L71300371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ca2b5da48b2475752eed5b8c9392be50c13ee182f521107062b55bb93b72c1. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QMDA62134821.