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 0xaa236ed63b4a360c9c57ffdac59dd60efc73b126bbf7f1eb55c57dd2c5b84f96. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82cd5b4e-2c96-4a6a-92d6-0196b1ed1bf1.json and https://artists.proofprofile.net/proofs/artist/82cd5b4e-2c96-4a6a-92d6-0196b1ed1bf1.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 0xdfce045d8e0991d1cb57700b93ed762065ba79c626eb06bac066375c24597427. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:07:34Z), 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/SE6QE2054227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7cffac70b55b26d7ce9c3f155265f39538816d30f56ce0e2403b99a8b02e32. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/SE6I32121250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964b4c1cffc4390a5591ba6791fa54ec19cf1b6595ef4a170fb0771da1951641. 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/SE6I32121309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2ecfd921fa3b11bc711bd3905e381b37ac5cbcd6ef1da7549a7221f6e864a8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SE6SA2122201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67419c334830f9ef33901534bff6e83e726ecbaa31b94160df163711c86d469. 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/SE6XX2173532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001f4de87bc04514b8f4f7ab026e2072ab19d3ecf787362e090dceb414f0a02b. 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/SE6XX2173519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397ed3ae903e91c9de3e7a6c2ac2230ddfbf78b74a63efbc1854fec518787a77. 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/SE6XX2173484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33feed368b5edd16e9066b0b9de8b9d39e075f5a68a08adfe19bc1fd55ad5339. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:27:51Z), 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/SE6XX2173489.