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 0x0ae7879294a6abe532b89c5402544753fb76037a345bb8ef0cb72e3e4521f8fd. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7c97648-7122-4d8a-b848-ddbdba8ea523.json and https://artists.proofprofile.net/proofs/artist/f7c97648-7122-4d8a-b848-ddbdba8ea523.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 0xf111e3807bb2bb51459d5515613f40058153766584c42d0ecd3aef58cdf24a00. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:02:47Z), 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/CAZ700300456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18914112473b0bb21f2034e4658b7f029c91e1ac4ad70ac9ed9287aab6f01d7a. 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/CAZ700300458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844ebd8f52c8093abc537e47e70fc33e6b2c6df2cf58667638b9d1b9d231c0af. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:09:49Z), 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/CAZ700300466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1f12022aa182a314f84a2b7c411cd48bc8be1da20de0e2426294fe803b85e5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CAZ700501247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba2e35919b496b902aca89e5beddc52cb65e8f04e37f333f95b777d9bb0f665. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CAZ700501255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b3cdfcc8eddcbf76d3f093d1d6952a4f093d7c7c6443ba948f46d42a00c936. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/CAZ700808083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a9aeb630407fb3d285ed927be23a8554a6fd814ef85b71fe2797e283dc77a7. 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/CAZ700808089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ceba5c413c36c1c4b63fde525c28fcce653e1923d26b911f2aefa4f572e0c2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:56:00Z), 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/CAHK01500001.