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 0xe124d031478b20482a953f0694ba687f7371980aede59529ba7790af3d942f6d. 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/62489581-5e39-4044-bc1e-bd5558f80314.json and https://artists.proofprofile.net/proofs/artist/62489581-5e39-4044-bc1e-bd5558f80314.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 0xae7b5cd97e46a839e1e34887751f52ca60bc98d3150f62b6c500bf2277eee38e. 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/QZNJY2285060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f93f3bb911c1b42c6a6f6290b7e8294dec3f4fad74ef66a787d74d6a6b6f02. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZNJY2285061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d5b3d262a3bc9f064d925e19710d785b802a3bdede34f651ab38a8d355ef40. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZNJY2285062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858f6c47bdc9972d9c6f20292590fc7ca76560fd32a1b0a451d82fce67d71f2d. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:06:44Z), 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/QZNJY2285063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc156896b28cde37d7927225ebb3fc7801fa9154ebbef9a59ac29d1604bd79ec2. 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/QZNJY2285065.
Compositores Mexicanos, Guitarra Voz y un Poco + Vol 1
Compositores Mexicanos, un Toque de Dulzura: Vol 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bebeebba86475fa060654f7784c5ea8fe1daae1a657da121fcdc9cceda5d675. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTPX2252183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08d388acccfbe13208e4306e0960359213f764a6e36eeda8534aa8ca23c0cbb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTPX2252189.