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 0x7d42083b7dc5cfa207727ce8a433815764caae4f98c934cc6bf7bacf11375c66. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e740c45a-4580-4d7f-a5a9-f2f6e51c0607.json and https://artists.proofprofile.net/proofs/artist/e740c45a-4580-4d7f-a5a9-f2f6e51c0607.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 0x18adc5e439e0e7d68e5c901a658790a4ca4de6412c727e06df61acf9c9de8dea. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:09:43Z), 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/QZTAT2347417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17c681c415220815c969c1d97c31832dcde61ec1c8d8be88639521f01cf8336. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:08:35Z), 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/QZDA42444288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bfe4d975df84652d8d63679881eb139477ba544f5b05d686a9e38751204395. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA42444291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f8967f762b792bc899f460ed804ae9eb5e80101c1e611df26d240f92baa657. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB82495963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747a90398b0980443a3538181e63a6439206a99f63d7bac5c7092f994c610634. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTB82495964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5351cfb6dc5c7b419ca1193db8ce98088df69eddd116935e2530da77fde20f8e. 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/QZTB82495965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20efe7d01ede8e864016ca1a098c1b75a70724afb7a4fe7c1fcfbaa926bee88. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:50:42Z), 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/QZTAW2531703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a2f77236b870158bdc897478750abf429a5acdfeda8609abaf68b3ac10c1b2. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZTAW2531706.