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 0x27b8b9a631171780511c6497adf67274fd89c2c43e4ef68dc437c44207335f92. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/249c2d2b-3a1d-4390-9146-d6a7fee17290.json and https://artists.proofprofile.net/proofs/artist/249c2d2b-3a1d-4390-9146-d6a7fee17290.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 0xeb771e256b5ca2ca6ea04b4030703a7b2e9988029651d8e26ba4582aa9cf27e3. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DES561928501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ea9b1497b1b35e7a93b9b6a580277cd9dfd091dff9ff6432f8b43359e4aaeb. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DES561928502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0e5efa3a64eedbcd83de835318af061f086d71a1a7f9de5a8593e13a59b331. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/DES561928503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad2b629f1d8090f204c2d4da5623a4a3f368ec8b28b415907f9f953beb9d3d9. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:09:52Z), 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/DES561928504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51818613f778818ef579042a5b5cf19125832820ee3a7f9b0052508e2859ac0c. 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/DES561928505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0315ae8e1b3a07b25e506251c98d9bd3e5b21b3b34b1e7d93b79987718cd28. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DES562210013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2532b15337da2ee2260cd84147f187ed70b23472811af6ec0092fbfab0be7a2b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DES562210014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970dc81abd4e27de4fb07efde25e9301c0ff08ee2f16576fa1377780b768e37a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DES562210015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c2bfb8f55a5c1e320cd854ce37e6d557039f0ae3fbb7b6c566a9dd69cc9476. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DES562210016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cd37280740796a3c2091c8bf15bc79aa390839f0f602cab443ca699163d91a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEPI82102430.