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 0x2f59824e02e7feea34c322251c749d11d7237fcafa8a5e8f2578eb79bf9308cc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c731c56c-dfdd-4d12-80cc-f5dba698f9eb.json and https://artists.proofprofile.net/proofs/artist/c731c56c-dfdd-4d12-80cc-f5dba698f9eb.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 0xfc3f05146d817df54854af8dfe23af289affdfe402dbe266a83244a7ae319b26. 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/IDA181235202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4438a3a9ce36676161a3a9c0096430fcf8f4c93eb3ebfb894004c7039222c2f9. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/IDA181235203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ea59bea2217a3e26f35041dc50d4a5933c781aaea83148622ee1421d77c9e2. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:37:03Z), 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/IDA181235204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78701e2f63b4000651dbedd92c303ad9c4af81fbfcb1485aa4b9270a61943a77. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/IDA181235210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2111677fad87cd127384befee3ec1040fbadc42ced56c99a23803381d0e62a2e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/IDA181414499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fe6fe0c233450aa852663f2446c55e47a53a8162d2773d8c13ebecd6f578b3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:36Z), 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/IDA181100571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40889652be8a74954dafd738ed9f74602d13b20f15ae76751921af9a7f2ffcc3. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/IDA181103960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab141913a4669ba4750d110f9478bef89b036421bb9778cedb8540a9bc6449b5. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:44:02Z), 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/IDA181241404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3895daed889153a53b85ab120c98ce55b289deb087db932e6d11065afb8c4c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCAJZ2567439.