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 0x8f7c4f1db4bb0cd14a5d7bac4db0e3b223c230c1bf5115a8b5e614595adaff14. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a90fc9b6-eaae-47ee-a16a-dc1891638e26.json and https://artists.proofprofile.net/proofs/artist/a90fc9b6-eaae-47ee-a16a-dc1891638e26.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 0x5497e445a7564dee1d4b206d16f0abc05f1313001078bea387d5e28685b88e9f. 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/QZNWX2599942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e3da902878ba24fe845c6a5b97cb5ff89f5667bc25d8f10643e14cc40dd167. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNWX2599943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64889e881409094773b1c680190bcc1357f0d58eb5952f4b98a19b698a7ee7c2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWX2599944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b975ca5737da23439e6361b869de9c9a3c260643c2523e82fb02105d1308e18. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWX2599945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a6c0f2c6362d478b1144498f13b4101e5c45ae7d467a8e1fae10afe05d5a34. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWX2599947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac19616a828bcb7c098ca6862f2da807e1ad4f0d744585ec7bc18925177845b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:07Z), 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/QZNWX2599948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f4412301d1ed5972b3cdb3dd6806063e4958afec029d8bd5b278acf3f4f633. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZNWX2599949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5047da7faab9718ad69e0e4cdeeb0db9f71c1b04d3a58b0fe9f33b4b1faeb2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWX2599950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b9dc8c0ba1f7f0740322fcc7e1888e1e7ea1a27d0e5e3ca8d1fdb72f0a67d9. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZNWX2599951.