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 0x8ef83e75295cea8b7627abd65a4b9a72d196f0e80a6b344b9bde025ae533ba9b. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ac95f27-3081-4bc2-b20f-feca5ef2b4c1.json and https://artists.proofprofile.net/proofs/artist/0ac95f27-3081-4bc2-b20f-feca5ef2b4c1.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 0x58abbc108dce4042cd4e0d07a736271f17ec6c9697281c64c9cca5447b8c80be. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ES75E2305351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1c7d2aa34108608d7e675f0a642ff9af5dc6ef4ede7fe554092907514d3de0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:23:58Z), 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/ES75E2305439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd934427306f6fde131c0f0603006ca22000ecba0344cbbbba55fd118fee678. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:51:04Z), 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/ES75E2305508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ea38d84128c37a4e917dbc6bd8dabdb8f890869872d2f0056e50b83d34bdc3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:56Z), 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/ES75E2305772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c15083c64cf82970c2508c56fbf82a0fc006b773f73846851e4fd6817121146. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES75E2305825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cba85356baa8376e9b92244e8583f3669fba74eb5cf43807535f0660d12f49. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ES75E2401236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c562755ad80f0363f702efd77f482fafa9d146e0bde14248334fa20c68faee2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES75E2401633.