A sonnet is a fixed poetic form with a structure traditionally consisting of fourteen lines adhering to a set rhyming scheme. The term derives from the Italian word sonetto (, from the Latin word sonu
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 0x46533ef29e36cf4efb203d6f518f4e7e69725b1773a4c4d2f42fc8af59eac8c2. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d5759cb-448d-4210-b31e-f2b480241b15.json and https://artists.proofprofile.net/proofs/artist/6d5759cb-448d-4210-b31e-f2b480241b15.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 0xe11f978ce57b70492cbb4586273152da18587ecb8967dc575ccc96e6f64af53d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:55:45Z), 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/FR10S2278036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc5861769890a97757fa7e35d14003231b737d5109bcac460ea7f324d58c0ad. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:19:13Z), 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/AEA0Q2387628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e55e3343d0fdd8c8939de5af83809b0b663e7a2e5157d0a0f012c2f1b30d468. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SMRUS0078385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfae8d866900b478cfd7ef20d9f2e13dab9630af28bcf6d18f32bfe33f47732d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/RUA1D2503969.