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 0xa2e55617ef4a703fd64de18d5d44e4574da73038680b4136ef4a9bdba1ed1712. 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/a42771d2-b166-415b-9ae1-400b8417f897.json and https://artists.proofprofile.net/proofs/artist/a42771d2-b166-415b-9ae1-400b8417f897.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 0xe25c0d409d21df3554fe1c676a193b7cc5c53681aee11feb999beabf58cc5070. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:25:02Z), 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/INM230900260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedde7237c9b201133f5c19dfece24a2db128abf6f171f56c77f7ca93cad1daab. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/INM230900261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040ae4c0aa5cb0046309e2284e75a8991107c07b7f26bd16fc9f4bb133fab8e1. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/INM230900262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb5e2c0289508ad671b4287db045b0b982c537b9fa83a506c29db6620591e9c. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/INM230900264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4652e211fd3ed40aeb29dcf959cb67407fc797f3ca6c6844a7df1a0cc867dfe0. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/INM230900265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7948020922e40b57633c7b07959e54c07c18d7b291e9b76736f6f5b812c6e2ac. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:28:58Z), 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/INM230900266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89b692d4f26711f22486c4af4b457e2a99aaf8ce3200c51f0428d1ecb306947. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:47:36Z), 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/INM230900145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122c00ddc8c737c66b31592900ece6e2b2ae9ef769d757d5cc86482c9450f76c. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/INM230900149.