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 0xfc163d6227c8360087e2bb0da04c24f09e28256c73b01b8d4ee6ae90e502feee. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a820e81-893d-415b-9a1a-01b1bb6a32fe.json and https://artists.proofprofile.net/proofs/artist/9a820e81-893d-415b-9a1a-01b1bb6a32fe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Gu: Spring Suite / Singapore Glimpses / Erhu Concerto
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 0x47b11dd80fd11cd4634d8d02b902e96431591c291cc4a444af1c6d7f264223bf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/HKI199528001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd281294922de13396f96bb441824a223f12c68045fe89553fe0d0fdb2c491bf4. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/HKI199528002.
Spring Suite: III. Early Spring in the Miao Mountains
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc819da78f59a8e9ee675ad504cebb78ee30f2490e2c5d82efbaa29a639af07d1. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:05:03Z), 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/HKI199528003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1523a4104f6d1ededea91d6ddcf3e80d22064b0574b25fdcc92f540f3b91067b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:09:22Z), 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/HKI199528006.