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 0x32f0f5389691115dfaf9f31d763d0af3ba017c295fe3544990fa5d9351119e4b. 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/b32d8027-c151-45fc-bffe-901cea517473.json and https://artists.proofprofile.net/proofs/artist/b32d8027-c151-45fc-bffe-901cea517473.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 0xb6154d2e0a1cbe82c64b626b4ce30bdbaf79c3c3193a891bc8fa76e18dba8baa. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:15:02Z), 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/GX53U2587096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a82d549ef8124f233c45e45c29417351e4d1f878f82d295673188e366f8e2d8. 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/GX53U2587098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416832cb0b958fc748f9d8b9cc7c06504b069bc0a28d86003123fbaf2984c0fb. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/GX53U2587099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b015401986be20903b44404a59f4a6d97f2b0fc3b4f042b2416a56a4f95745. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GX53U2587100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b46cb0aebc88ac55d9468a0fe85d4470a867f8c9c994ac62ce938e1903df1fa. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GX53U2587102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d9b9663dbc806394f4b39c2f184cee9d37c66521a5bd45a582ee72e2b5e13e. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GX53U2587104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0ff0f6b8c5624c715394d7bcfce036c4de94101fde04db940a2d572fe27c99. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:51:29Z), 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/GX53U2587105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1fbbabab2270947a4dbeaeadcc7921de55e452c54cd7abeae3f7107179347c. 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/GX53U2587107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62042063d0a11059909d31338dbc3cb359841a23975bf2623b9e79a143c5b416. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/GX53U2587109.