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 0x96a6a2bbaadbad8f46d2199f6c3b20335054bdf57a8512a665d39a9c3a0647db. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61d4a5b3-d97c-4123-be11-8364aabf1c36.json and https://artists.proofprofile.net/proofs/artist/61d4a5b3-d97c-4123-be11-8364aabf1c36.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 0x7782c3a46871cfa5e534f20dd603e06f246216031f926d5137fc2ba75040f340. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/QMDA62468959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5d32d1c72ec1c0760feb28c045b3c9d1d67f237b0817cfcc8dae3055e6a891. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMDA62468961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937c930b0d399c3a974ece8abe57e2ac0dcbe9cf843b41dba12a2952c9e5cad4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMDA62468963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d667ad05dfe06af5a97f4b2112108408a188cd8221312ff91956c9a683ccd4. 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/QMDA62468958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7782c3a46871cfa5e534f20dd603e06f246216031f926d5137fc2ba75040f340. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMDA62468959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af10ec6e60bab86d319e8b82ce3ebcf33c1ebd912db5d8537b7cd84a09e98e5. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QMDA62468960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb034d5eaa2a6ff9c985a9cdeabaa1124c64857968e62a98eedd3b557e84eec2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:47:22Z), 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/QMBZ92588372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad4497e9263b5b9698ed871df1d9c8d50f4a9f320349b69ffc4a0b78b79857c. 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/QMFME2581618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edabc8f85fb59b62d3e50b271592181f64d84f875e859da67284b865b708aca. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM4TW2460168.