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 0x441d6bfe5cdba5773eebfcbb2facd4e69c7bb3b36b8f671f9b3cc4e60308fe89. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52e3e1d6-3879-49fc-9473-5da9d79d8701.json and https://artists.proofprofile.net/proofs/artist/52e3e1d6-3879-49fc-9473-5da9d79d8701.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 0xb63f07a46f9be67d202e07e9bbdde71538a3ac65dacc87fe14fc05743719acd5. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:01:27Z), 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/BXGOZ2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386ba8bd8aa175d68005bb8cb7f8a44e93f9d6889aa9eeaadec73af515fdf4f3. Chain 2 (Bitcoin): anchored in block 957633 (2026-07-12T00:19:47Z), 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/BXGOZ2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb972440f2c7830f1449bda85748133b32b83b3ffd40c0a550bba47794285aa. 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/BXGOZ2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10ec70341ee790e525bfe78564671462c8e4273cc9118895fc59fa78fbb7c48. 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/BXGOZ2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859d9ae006523aff08a7844f65ab5f196e126a0b3970a2a44d1706c7aa3d4b38. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:01:51Z), 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/BXGOZ2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810e3c91f0df68508e1ec02d9f07214b5b3214f56bf1a619780b535b0e91e481. 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/BXGOZ2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee9101ee651741f72f4201a729d6a6ecbb34a3dbadade796e595812ac1dfd8d. 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/BXGOZ2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63f07a46f9be67d202e07e9bbdde71538a3ac65dacc87fe14fc05743719acd5. 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/BXGOZ2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc34f30d34c7410071438041ab4963a5dfb59743bb554a60d1f6ff14d752a12. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/BXGOZ2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d530934e48a2fc7b86d2a517d7818b31266ef97e37778fbb6956f01e4e77fd. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/BXGOZ2200011.