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 0x3cb6478064c52c304a68f922f9151ede9acbf6efc306e95d3de3fac808192c36. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6bae653-08e3-43fd-9777-261178fdb8ec.json and https://artists.proofprofile.net/proofs/artist/e6bae653-08e3-43fd-9777-261178fdb8ec.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 0xc6c5bcdb15a6b0c0f6e8463d03ef8b0678a1fb510050bb514b20f3ee04eb72b9. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:07:25Z), 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/ATR981267119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75a01feb85433ccd48ca841d9902f92d0bf0be8b387970835183c4a0703769d. 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/QZHN72348395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345f618c7028b01e3729b7580ad9fb29316970e5393e1bab48df5ad371ef4ec5. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHN82463539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5ba2947f488db68c140492f5eac7b75028add40b0e826be3b59bc2d2a72158. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:10:18Z), 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/QZK6L2421836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa49ac2f60f595db55d83d9d5ff923d150a18f1b4fb075b114a54c30dd56e5f1. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZHNB2451851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb773bf464a2ac0843f0de818c0302baa610b75e9e0561f3963753c8dea49d9e4. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZFZ72555247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52fd1950c0ac73101ff294a8b44e6b7792f90fae0859b566043548df048102a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:52:44Z), 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/QZHNB2512626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a511c6438bd22ff95f7aa7156ee1e9e3ecc6b9d7443f28b946c368fa87aa2c7. 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/QZK6H2562132.