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 0x259db7909d7505853d4376b48ee09d13a4629b6ef47fb514ac4e9f98684120bc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf901b29-4b2f-4d5d-9436-86a10689ca97.json and https://artists.proofprofile.net/proofs/artist/bf901b29-4b2f-4d5d-9436-86a10689ca97.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 0x2ddc29827d9f6f238d2d2a2e660fe2885ef891c575c589c9ea4bd50731ab47ff. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:54:13Z), 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/TR1720700183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8489baf8bcdff03a40aef43bf693df86addee5748cf7e504a8ebc149365895e0. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:54:16Z), 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/TR1720700184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4300ed0d8dc326ce2370b293fee169251c30c7b5b442d81e069154c99a2894a6. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:41:55Z), 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/TR1721100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7bed5ef2b5b0a976180dc40e071d190c7ce03900b0aa2a4663b09dddf88b5e. 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/TR1721100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186b744adb71fd12ae21efa5b8b6f72b74116b369a752004b7f8dfc3af52cc47. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TR1721100017.