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 0x6340c81a9c913086d480cdf4a728f50cc8b88dda0c4bcda96d1caa59fca9708a. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63872f81-a621-4402-850c-d1a87d5e0db4.json and https://artists.proofprofile.net/proofs/artist/63872f81-a621-4402-850c-d1a87d5e0db4.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 0x7397b89d473d4292358ea40d35763b359685087275f1984cd35dd513bb57afdd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZPLR2525096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2720b8ad77238e9eba09e34262fe52ef6aa96ba5001b184a97e4d82f65fc11ca. 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/QZPLR2525097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b6bc6fa7ceff6b423da3270c2b348e329e250f4fef8927d9be0cf2afa3ca8c. 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/QZPLR2525098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44e829f35a1238743aaee69da2882afe6fe03607e725f5032037d0c905459fc. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTAZ2582810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe759e7ee11f5e79b491a5eafb9e81231fa03d4c32618ba9b4df45e4b48e3c37b. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:59:48Z), 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/QZTAZ2582811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f973e1fd32a76474a63467080fc409bcd2ea78958551745591c4f1a9c93220. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:54:25Z), 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/QZTAZ2582812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7dd5b369b6d68ba843727b6ed4ed032afe202cc1dd0cd6e505d99b7687af5c1. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZTAZ2582813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bb2539a459d72fe1356a8ced89c0f2249b05c6702fdf06d6ce52e2671be8f3. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:54:45Z), 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/QZTAZ2582815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69fb0afa92400d7987add6b60d3201d02cfe823a7f37b8b7ce9100928cc9664. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTB62599573.