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 0xcf8c43c7f8a5bc67f8207d8e1bbc2e927bdfe30c90026a494c274e3820cda1be. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afb29eef-3cc8-48cf-849b-047d192ded9c.json and https://artists.proofprofile.net/proofs/artist/afb29eef-3cc8-48cf-849b-047d192ded9c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jugueteando con la Música: Sonrisas Sonoras
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 0xe72a85fe9ef9a65e50496c27206302cdce15e5ba2e885fde4eb53c45fcd85372. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:30:38Z), 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/QM3DF2249702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe416416932f13dc1991bec883c9d467e7dff9043e92ecc5c08b71db6203b3baf. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:03:23Z), 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/QM3DF2249705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2ed0888e264cdac3af6420fcf82f9a859f9a10fedaea0f5bc995c42c07d0c3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM3DF2249706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94202e5a6469e6f05ebeb8b69559e1351b9fbf4a82e2d86d6d0fc571ed9e2e0. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QM3DF2249707.