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 0x287f24fa24a74a42a57f0a19c99445a32295a9b283a8d5c4c8692193e97af2ab. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97926d2b-2a7d-4a28-bfc3-40694bfe6fbd.json and https://artists.proofprofile.net/proofs/artist/97926d2b-2a7d-4a28-bfc3-40694bfe6fbd.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 0x7299977891d317b33bd8f126a9cf7834ae37847f35e63b1b65ccbb5fa8dc0581. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:09:00Z), 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/QT3F22547928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781e050c04b92cd69198fbae5259cbfaaca87c6dbee19cf876e8f4347ab44544. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAIX2402497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281274a538c34d9bdc008c78117a0e40230ab05bc65672286f06fb8fef1db2d2. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAIX2402527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931cdbf59e65e71c0a1e36b1d16d46ef175f3ead059318767cc9ddb9eb592bf1. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCAIY2402535.
Morenada Para MI Entierro, Bajo MI Mascara, Azul Y Amarillo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1f01798b74ba145e97024aeec0583a8d2ff8cb5ea3027eb36cecb04fb0fcec. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAIX2402555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f32c2a67a01d6d49aac06b8b79637d38529818495b9c753d7edd58c34c4f88a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAIX2402574.
INOLVIDABLE (Versión grupo Andino de Oruro)