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 0x783694b4f709efdce62514e8d70d2c9a89d57975b686bda6e0790b7aae31a2d1. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e08b3d3a-bdb7-4b66-9709-60f15c3ecf95.json and https://artists.proofprofile.net/proofs/artist/e08b3d3a-bdb7-4b66-9709-60f15c3ecf95.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 0x7cb60118adc541a140f3e77308501375ebd1cb5663307aeb9a7b189b755f5db5. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QMFME1548684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782d55c7c542b153a350ff3a469ebdcc185694d3d3ba5ebab4b3b0e3250dfb65. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:56:40Z), 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/QMFME1548686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bfbcfec4c43ec726c9bfa04ece2f7dc31a92fbf7054755b844047d3e807e2c. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QMFME1548687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e803ac24f42ec18ea79f5a10a2ac22c518fd1b6281d5238ab5a870702dcda6. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:34:38Z), 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/QMFME1548688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315457aaf0b9af5680b69e62785967a472bd578b9b03d5de506dc20bdca09f21. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QMFME1548695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588f1ca3d588c13b7f7a4b1c535cb04dc53e2dbf044e9687e25f2069cf896e44. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QMFME1548696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2018b34afaf929943ef8ff605a809d7e633e60e1f95198dd87ae0a78518eaa. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:52:39Z), 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/QMFME1548703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01572a9f76fc14dc25fce78d4f3543a170c1893311e319a18b3997ec78967c0f. 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/QMFME1548704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca08935c9607179d725d69cce92185d4bde52c26c5dbe3c527317f16ad8bb076. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USJTQ0904492.