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 0x2ad7f8838caf0aa19a4fc044c270558ade681180b8e41f9452d395f3dcae4cee. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9072894-9f7c-4ed2-b9ca-af40986d4a14.json and https://artists.proofprofile.net/proofs/artist/e9072894-9f7c-4ed2-b9ca-af40986d4a14.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 0x650d24c3549ddd4f872c6f43c695079b73723c5185ad6cf492278614ca8f1665. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/GRHR11100301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761e7b290b4fe9123b175470b5e0ecd2c94ad27329ba25d4b56be77099169102. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/GRHR11100302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d6acf24cd3575a265c315c287d8b3bc700bd567dbd0a7349fb297acb3ba59a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:59:50Z), 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/GRHR11100304.
Etude in Dorios Harmonia, Minor System in Enharmonion Genus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f91581e600326299dae3f3ac95e2d557c69e86817511cd621cd5a1a9f6bfa28. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:40:11Z), 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/GRHR11100305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f9b5eb74ea2ed30c38f7dec5f77ba75cb10e58a27b6ab2e7b731048be3d53b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:57:19Z), 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/GRHR11100310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3355e6e57685c7036dec37291b4b71fbb7ed486839ad013dd7251b35b66a56c5. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/GRHR11100316.