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 0xbd55cdb9f38a4254bd8358f95b2fec6cd62ccdf5dd746908bf03acbbaacdbb9b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39c54ff1-5c26-45c9-8ec3-a287a85170cc.json and https://artists.proofprofile.net/proofs/artist/39c54ff1-5c26-45c9-8ec3-a287a85170cc.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 0x687aae2711a6c83801f2f32d6873d8431c912f1eebb8c8cbf7f02132fdf23f33. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USNPD1218283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002a3995ebb0710b741e1a453218612e52023a91903fbcbbe71be854a0a3dafa. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/HUAAU1600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f469084cb032161e642cf04052e3a0e02e3c5cb59e0d88d1f6cc8582dfa014. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:35:32Z), 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/HUAAU1600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45dd557f07fa8046a27796a11c3fd6f0ffb61ce3294d701351ed234970e5c69. 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/HUAAU1600032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe538a9babcd036f669704b3fd6a587f0216e9aa38efd9965e6e44d65d9147f6d. 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/HUAAU1600038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fea8ddffb003e5c68a551264cf20e0bcac913063c02ba8d360a1a7796183eb. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/HUAAU1600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa884cf85b55b37aba2de0b19040c805d1611ca46b18c65cfa98a0f48367adf3b. 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/HUAAU1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65478f92447b0e14ac38429573eae62af6c00547b285e31b496e27f532bc5c7. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/HUAAU1500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d5fdb32f5fc5713b83a5a60c393e63ac0f758a9e80b55bd51a64281d1519f7. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/HUAAU1500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830c19257dc35423234dcf1fa63fcdc791742d9dfaa83e0f086cc799ed31e594. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/HUAAU2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2bd27d071321ff69217316caabdb6fb1dadb919eb8ba16771070d885410830. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/HUA612402571.