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 0xb62383472612bf58f61663d9204e8c49cdae9a0d7578d4f94b9e856a27085233. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf83d458-8a7e-4e40-820f-8539cc82ce41.json and https://artists.proofprofile.net/proofs/artist/bf83d458-8a7e-4e40-820f-8539cc82ce41.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 0x01884e9b2056e4cb6d07a7e8403d28a1a292d52d685972fc643741e0bf059088. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/TCAJE2563282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60634135ab9969a4acda7ac4f9cddf4438bea92ad8eb040875aa08284a8d2ea7. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:59:37Z), 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/TCAJE2563294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847191ac94745a7e44599802b75bb5519bff8f058bf4871db8ee55fc15516c81. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:08:39Z), 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/TCAJE2563305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec579bcb996cb55ac3fbe819773ec173b4276a92ddcb34bc43953c00748fb651. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJE2563306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f60a17613f5db903b82ee735ecdcf85e9927f7f7c59812a56500f366720f82. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:49:00Z), 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/TCAJE2563307.