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 0x5f244d6b0eda0cf73388e9cb488779dfd5ecd80e2d93b3d5751d0cca40d34286. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86f87c03-9f99-4484-a674-83d837a96e54.json and https://artists.proofprofile.net/proofs/artist/86f87c03-9f99-4484-a674-83d837a96e54.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 0x58a48add5a4db9286ac8a582b7ed1236f914133b6a95185ce5cec9058357f5e2. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:13Z), 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/TCAJR2599800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999c6a4b83a70cf14ea2edcf9228169c176c13879cf68614e7ce55103e5364a4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJT2548442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc620809d8c39888743232ced8f1411b5e1562f90f40d5f59fd81013f0f2b3a56. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJU2584833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9aa357859964244169903a3133b715e075780480f5003a64f865bad49c543bc. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAJW2549928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390ab45e41ff27d086d4649e91ab5283fd11c5a71f0fa1739c9a14aeb645d6ae. 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/TCAJW2573076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792464ce867c0e9000b8dc8b91cd9fff26f7010bd3eb96bbd436b4b0e5c793a1. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCAJY2515383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6fbfc8f6d632e1bcb81a5ba1228e0b948486af059793cab49ed8f7b1cbada7. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:15:13Z), 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/QT65Z2591697.