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 0x012cd108916719834e50bed19d243c6f173226023131f75e172a8105a275c96c. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c020557f-5ebb-4ad4-a2ed-532ea8eee57a.json and https://artists.proofprofile.net/proofs/artist/c020557f-5ebb-4ad4-a2ed-532ea8eee57a.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 0x838446e6a8d59b53460e9643c8161adab7094d34bc72e4a1ea6d7baed2bf388c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:56:11Z), 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/TWX351700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdce7e27e1f1fe7cb3714737efbd63e032d37939ad2188f948fd64dae3e980c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TWX351900386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8c758fc3ab01c1c9177dd30078ebe8905e6179dfad6dae51931db3ad808491. 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/TWX351900387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7b7d98a859807e70d5f5d817e85acb1432f71508c0c070a441e37f65929414. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:50:50Z), 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/TWX352000129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2155c089398bdcde0097d69c3b305669c3a9f4281775a447f2ca78d46f4c0cc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TWX352000268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9491ccc9300bcc3847705a96bbe0386e4fc4607198115912b5b037a7ddaa8b7c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:52:15Z), 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/TWF712100241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a0c2f42067c3723430fadec5b6eca006faccee4351c1655ede8ce45bb5d9bf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:45:03Z), 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/TWF712200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe40977658d775f6c58a42f61c06b3a995936e5356343969071de747228346e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TWF712400037.