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 0xcfa2e1d783d7e5d1d863ee9b64531e5111af56d9782d4993b87a3e21c61c2414. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7911657b-1f15-4ce6-b04e-ca96c10f6d63.json and https://artists.proofprofile.net/proofs/artist/7911657b-1f15-4ce6-b04e-ca96c10f6d63.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 0x5e107851b9a7598c7cfb076f0907277510059b9bcf3147b5f1bb6f62dd4302fc. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:36:06Z), 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/QZPEW2510820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc918d48f29a63abf497bedfcce4187695f69b4cb323225bd73aae79e18b36eb3. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:38:53Z), 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/QZPEW2510821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70a3c5ff78d2e28bb91b423878b417f116af7ae5d0a47f989fc1b21eb2c1e13. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZPEW2510822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108e267e7033252c11b97d3508fafe7de337c474cc6236ead3598fae6dfd459e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZPEW2510823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f82511ccf8fd9dda690feda173c39918a8473a6fe15c95f803ba8795a06187. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:14:37Z), 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/QZPEW2510824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7bfb844ab2cb70da382bf2737547e0286ad6349364ce57322b657d15946d1b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZPEW2510825.