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 0xe22f7ccf09d97714f463e913f811d2d1736fc224dd3275867d5e6ceb41c96c3e. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d27b297d-129c-4b75-8efd-62d31ea01dce.json and https://artists.proofprofile.net/proofs/artist/d27b297d-129c-4b75-8efd-62d31ea01dce.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 0xdd2cd35a3fb83994b38d6c25c49d781c5cb3870140c583a8a2cfc7129d7374dc. 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/QMFLS1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b7d1372966fb072c67d366cdfb5df2b1d301c564699f954dffeea00097334c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMFLS1900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9c49d263105c0009baf7280f3a56dff585791fa1dbae129c65c2a126818f4b. 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/QMFLS1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c553cdad6afbb8ca9510f62da43222ab3e54dc79d6a53b226e727cc4cc7bbbb. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QMFLS1900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5e4f1b2627724f2e37e1cce9d6ad894e0a0652cf01582ef6ae180a4055f259. 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/QMFLS1900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fcdfa2b79ad757f4dd68e09e685f6ffa1216f9b36f873584fd605ee94fd7cd. 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/QMFLS1900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5228c51971ec44f9df51fa08d2bed95dd3f922dc31c191af670eb8e43d035036. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QMFLS1900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adaca096c87ec0dadf78d275e5e73fad689be0a6f29290a8930220a51adfae8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:09:04Z), 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/QMFME2021586.