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 0x98b6b6b8a709bc64ffb6bc5425498a589ef4d358f9c9e013a8eaae1f33a9ac01. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df03204e-0bce-4cff-b49c-f1dfe30f51d4.json and https://artists.proofprofile.net/proofs/artist/df03204e-0bce-4cff-b49c-f1dfe30f51d4.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 0x98938d56bf640185e74e384f1bd76024d70f37911e62beedabb7846eac90a618. 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/TCAIM2474964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e771a7686d057578f31e0d238997e2d5e570f8e8ef22de3a8a3a2512646594. 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/TCAIN2476514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1baa4c82eee76059bd51da98f3fda073f3a951f60d2976b4214d02720d52b5. 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/TCAIN2494317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534e8bcb36350c17cc83169ff4748fade0d0adb085fe2bc63a1fc09f3486bc6a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:38:49Z), 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/TCAIP2416440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12b032165e420bd176a7735b170d72254671133ab6ae1ad31f943ce2e93985d. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCAIP2496984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72ef06c82ea0b862dca8c0fe27db1f8ec0a51042f3612dddf8f94050602d6d5. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/TCAIO2497000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd00e55b146f67046447168f32c363d889378b63515d0e6fe8e925e9a6c32514. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:39:26Z), 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/TCAIO2497003.