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 0xd1d3e00ced82cad0af2a6bb7a8a763f480df0ae9102ab51d59a5386aa9a966d7. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a2dfbc9-3738-4e6a-9b64-67be22ffc8e8.json and https://artists.proofprofile.net/proofs/artist/9a2dfbc9-3738-4e6a-9b64-67be22ffc8e8.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 0x2c8f6d5c8a4c7e22736b3ddc0329afebab7c4e44ed664c01a288e3e07a5894f1. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/JP92E2400251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e65243c09a32c6e2fc4f2560d9f6fdd1faab0d68a98836740ac6fe4453e24ee. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:40:20Z), 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/JP92E2400430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5849777cc9d8a974f80af8413ac63a32fc7b0f96aad6958815e3c0be6ee383. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:55:02Z), 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/JPR502409045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9b062cfe8528501a42fed0dd1372e28dcba5ee464deee718a75c3c85c6e154. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPR502408995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c264f76ea7ca0aed3665c27a0f0c2112703cfb9c4a629e0e84bedd8513c1bd7. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/JPR502420267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ae2988e929ff1b0225c6bd9d2a2b82abebeca5e1e91bc9d0f4f139e09206e6. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/JPR502420265.