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 0xceb79f8cd4e5276fd1cd33325e5fda883ed06630a6bbd851c825c8356073f21c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4dfd683-84ef-4fb4-b52a-f0b698c47ab7.json and https://artists.proofprofile.net/proofs/artist/d4dfd683-84ef-4fb4-b52a-f0b698c47ab7.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 0xf216a401c3e84470eefad2e6ea02777a108ec03e4d586ca563cd3238830b9eeb. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:06:01Z), 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/TCAFW2176366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e8767b2797658dc01449fc22f8a734b1ee5a75232621924066aba5e6d8dc32. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCAIX2459531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a9e30a02ed0af1ec391e68f87c9807a8bb63e93a22e2016e7f527f3cbb8fbd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:04:25Z), 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/TCAJB2405669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6cf2444dcbb02140f68f4a7115cb73c168e8e2a02d9e5c96df75afd00f5472. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:45:14Z), 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/TCAJE2541667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac606d7c10f7b21ce4534ab6fda05fcf0837f589d0037b3b34d477946edd622. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCAJS2544640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76328bb15fd011bae52104d221283326ea09c9864d65e21e3fb07f6cfe4f012. 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/TCAJT2558975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8b1ca5a02b6c876c6c7ae900f83dd2684a2a952c6cc7013ad503ad11ac71fe. 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/TCAJU2585217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbbcc73fb3c16a7210e6002f8f93b95cf17504a9b47310cfb107535f93bbec0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:54:29Z), 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/TCAJU2585089.