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 0x6d911c4c69388bd66590787b2affc500a3670ced6a128b53e43a1546b29015bb. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/193a10bb-39ec-4652-9c6a-e7463d07a9c3.json and https://artists.proofprofile.net/proofs/artist/193a10bb-39ec-4652-9c6a-e7463d07a9c3.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 0xc93159075658f94dc495ac6c95bd52909bd09287bc4e343dfec2556cde79a837. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:12Z), 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/SE5BU2550520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb805203ad3664243a042ffe4764af4fc05589b189f5dd959ba9d3518fae0dc5f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:59:19Z), 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/SE5BU2550521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1bb1e2617f9464328cecb77300f595edfe3b99e28772948e9b5d8c2135b233. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5BU2550522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ef9baa13d7de6c7e038142fe8a38b2c70f2435ed0ed88a31125bd71800bb9e. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/SE5BU2550523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf82bebca796dc3ab4484d082e16a481db6d4f46bc8a50f93d75a7139c68f58b. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/SE5BU2550524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc601810477faa98d4aebf7af17bdb81eabb40846c2c32165678c6b514add0c63. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/SE5BU2550525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2228c8ac4ad61ecbccd9022545b273505d5cfbd633f4f20d79cb1a0653c78cf4. 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/SE5BU2550526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9624461fb7545366ce33ffe08fb4001e0f6bc593ba7d30b5ccf1ac8efb754f5. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:07:24Z), 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/SE5BU2550527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c50b9acd41405601ed8d53f7ff015474072ed060c783b3b2e8b1f429758b633. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE5BU2550528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba476ca1a60173d3fffde6d04f06b72a692795e52a30fbd0fa1d88a44ca0cce2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:08:06Z), 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/SE5BU2551207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3452fb8dc7cb545251ea9dc47ef3c0727da931242a9493d8cf44ac7173c66f. 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/SE5BU2551209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6a7d5bd0d997e25ef63f80941adfa0ec006eb169087347a73529f903e65d7d. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/SE5BU2551210.