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 0x44d46b3cfbe669494c3b1ca8bc5b153006e0ae030ba2e9ab2c03758846d36362. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b278c982-ac44-4c60-b1b9-0f53e5b9c8ce.json and https://artists.proofprofile.net/proofs/artist/b278c982-ac44-4c60-b1b9-0f53e5b9c8ce.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
El barberillo de Lavapies: El noble gremio
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 0xddc6a93f8b9bed0af4de2b2187104fc2b40a745ff1d75e25e5ac87e634ca83b1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKI190152502.
La boda de Luis Alonso, o La noche del encierro: El baile de Luis Alonso: Intermedio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91510eeeff5223f1a3498b357847b25368392285488705542b0b8811fb63964. 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/HKI190152503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4db7a6b8f09071c65560f30c3b23efe41b6b0e15ada1cc2a4a4cc54dc2fdf2. 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/HKI190152504.
Agua, azucarillos y aguardiente: Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2630e9d85feb2b1a0552944c9a1ec2da236555ad3b8f650fdc9f1b1c5b7425. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKI190152505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab62d5b18b0430a70e569d910eabb0ffbdd59aa51789992b62027c0e7168f1e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKI190152511.
La del soto del parral: Ronda de enamorados
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d79e2a86b5ff58cf69f987769c02d614526d987e56dbfbc747eec25ca0527ef. 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/HKI190152513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493385d3edaf6a989100d6e42ef99c4b51bb2d7874b7abc90dabbda9e80d1588. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKI190152515.