In grammar, a phrase called an expression in some contexts is a group of one or more words acting as a grammatical unit. This means that a phrase can be treated as a unit within a larger structure.
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 0x8f70aad8c000b43d313f6624c0a9ad0945a67ad2749eccfaef5bd881077f8ef1. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4193f09-4ad5-4f31-8c3a-46bb9aac9b6b.json and https://artists.proofprofile.net/proofs/artist/f4193f09-4ad5-4f31-8c3a-46bb9aac9b6b.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 0xb597ae715e6c7575d2fb5b2bff8d0d5666e95c1f3a62eb9a2eb684eb9b521bff. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:07:16Z), 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/NLCK41097037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35d0876a698ab6f1c1f4a17af72e77ae24b4497f8922d204b64b074348590c1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DE1JN2384746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cdcc83db5f984e72cbb8fae19ddadde2b668026020500ce9d836597e6b5d35. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DE1JN2384294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959a88e1d288b3cb51f64be0f20cbcb9f0abfaf9c7fe711c6509a11620159e13. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:49:30Z), 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/GB8KE2422555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a3a4b646a44beb8b4095294404481e60a05d55861bace63140e024e73ed9ba. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/CA5KR2537772.