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 0xc98aca9de8b248a204da1d1cec68960b8a570613b2e7a39cb2894c2b1134ccc0. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69a84ecb-e9e3-40de-a64a-cfb5eaeceb99.json and https://artists.proofprofile.net/proofs/artist/69a84ecb-e9e3-40de-a64a-cfb5eaeceb99.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 0xfd346bcddb0f5c850b51ea27c19f7f7c5ee4f3cd8e56bcb4a20f8242e2f9cb38. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:56:06Z), 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/QZHZ41998303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e98677fbf7c1b8bb3c39f0e499677950800915759378cd3f87776a1daa54e93. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZGLS2095686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7853af105055c0232fd8d66247750515a3ee4e22a18d6bd44e320987a91505. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:40:59Z), 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/QZMZ92141235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322d716d44d7025272bfc3b9c800a474ee41d65105c9b58a91b2fb70f1c43074. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZMZ92141238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379370382af8787aa98ad5f6aa8a85bb12f034c042d9ea24df67183e95ab3452. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMZ92141240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45eff9393dcb8b6ba105d603f684655eca0f8a957fd908a8edd0fd2fe2cf760d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:20:57Z), 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/QZNWS2492371.