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 0x1beb2556c5d952f84eaf3f1724c44b07fc9db7681e530bdb26a524eb78c4e236. 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/f131622d-e657-429b-9d05-6c0b069834c1.json and https://artists.proofprofile.net/proofs/artist/f131622d-e657-429b-9d05-6c0b069834c1.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 0xc4464447a0d2fe7a561b893e08e4a90eb15474dfe137010e125d3926686bff97. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CAXF52100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b7a02e2e905d64c139246593d2f2113fdec317add98eed316d91ad7fb66be5. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CAXF52000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c4c9f2cf4eaa715cac146fae6584468dc234c7f58518b149635bd906553d5c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:21:42Z), 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/CAXF52100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47e003c058f1f1996eba858f8e21649dc69c87b78a073e228d018b9a7969e1c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:07:16Z), 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/CAXF52400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffcdd66bf262987e0c4092dc6af874a3cae072c3f1afd70b07f18a8baa8a793. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/CAXF52400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1bb50236b20f856fc4058fe46ad066e03372fb9e191e8929370ac0f3f7c05a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CAXF52400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd949f93525020533f77dd2ed1b82a168f657ffb6d979b6994298cf1c055eefdb. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:11:00Z), 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/CAXF52400010.