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 0xb85c246c95e45548973f409bbcacc77427c8f956732514a496ab42adf44b7115. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47a3d2fc-1c52-440f-94b9-1d3007aa72f4.json and https://artists.proofprofile.net/proofs/artist/47a3d2fc-1c52-440f-94b9-1d3007aa72f4.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 0x13109406fc3bc3b16d712ce81e0475fcd6a1b71945a0181e3b026d5d737e74db. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:48:01Z), 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/QZWFH2302206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7b5522a4b5c14388d94650bc2053014870dadc6b507c4decf73a21105f54e3. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:30:07Z), 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/QZWFH2343653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6a1051c458400589d85bbb98e03917733c2c0666b17bc810e984a372acbc5f. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZWFH2343144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043816e2a78c8b691a5ca9d85ded71a26923ddae27091d1946d65970941fb70a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:23:57Z), 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/QZWFH2343143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4a8fae04ca3ea1004c6753984c450f73a5dbf7c963ff22fe12d1ec44c89cc0. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZWFH2343148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1892e11c28979d80363d79a3180d764c41c3912aa6e5e5b694fe52e30666cf. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFH2343652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8148a116a56aac17e656156e225466a45569b5468c7350ec6dc25ab17dc5c81. 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/QZWFK2324648.