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 0x1b7f19bdd02d446651eef350238f04d8cd0a877d7c73b198677305837f1c2186. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d02ddeb-6673-42de-a9c4-bc6c8c5935a6.json and https://artists.proofprofile.net/proofs/artist/2d02ddeb-6673-42de-a9c4-bc6c8c5935a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cabrera de Mar (Live Session Chez Xefo Art Gallery)
Sozinho (Live Session Chez Xefo Art Gallery)
Siempre sale el sol en Barcelona (Live Session Chez Xefo Art Gallery)
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 0x4200d0d56c41dc074ea6cbb1dddbf9e1d6fca231a40aff6addb6f294343b5ea4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMBZ92498228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ac1154e145635a6fd7f703e63227ac52342b9f696630f1633d6c38d1435b3f. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QMBZ92498229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6b0d266cb8b956b550102692216f697c232a091929cef2cce5847b148daec8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMBZ92498232.
Te deseo lo mejor / Todos están cambiando (En vivo en Bridge 48)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4a35187b3d8adb6793125e02796ebe1a2d5d91dbd49bbbd6808011be5bd5b9. 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/QMBZ92524719.