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 0x08759cac360cc36e4b2aa94afcce435d871c2490c894d9a300ed98bda3951ee5. 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/e3b9d0a1-7baa-4d20-91d7-100d0afb5661.json and https://artists.proofprofile.net/proofs/artist/e3b9d0a1-7baa-4d20-91d7-100d0afb5661.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 0x082c09d5ab4c592ab3c0d0262812422cc34ab4999307cb9f6482ab58b32651f0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QMHUY1553059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced1dcf45312c48af89bcc23d0921db341e61694342ab975e117c82b5b6e523d. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QMHUY1553060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5667503e6339a1868c770e495972cf56cfaa1891486c24620fd5f4bea8699763. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMHUY1553061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786e0c989459ffec9d90205a4624587a43904f37725daa4a1df51add01ce9795. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:52:34Z), 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/QMHUY1553063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04276909ee444726a1600cb02d6c45e4ff9ceac7973a1931f15bd6944610488. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:59:09Z), 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/QMHUY1553064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563909a1a61db35a55e1a78c97985a3d112f7da983256651bdb1392d7771654d. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:48:37Z), 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/QMHUY1553065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f1beb8fefa79f88aac3811b62ab9f999390c30f3584216131fc17e991b453c. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QMHUY1553066.