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 0xc664506bf71da75fcd803a77c9f7f8c38cf293f0921ea7773883e4744bb62384. Chain 2 (Bitcoin): anchored in block 953627 (2026-06-14T11:43:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f2a84de-0a12-4a4b-8238-fddfa6a1ff22.json and https://artists.proofprofile.net/proofs/artist/2f2a84de-0a12-4a4b-8238-fddfa6a1ff22.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 0xace98cf25700e5f74ae6578fe32bc3f16beedad4d2fa9fa884835b5e155cea04. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BEZ352400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80927212036d6d0f810dbe6c44236f0b4d9cae330f9c8822772ea5f354e2271. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/BEZ352400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b2bafac12efc8856634f510ce57eecd10f98fff88f0000abd36d0304596bbb. 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/BEZ352400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd33880d41bdf231f6099cfeef4ae4352c5e04a9f37bb11d7d9911cf898457a. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:28:57Z), 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/BEZ352400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd493fb8ff9dc5743c3b79d99fea495d3251aa8eafddf265393aeafb39ddf1101. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BEZ352400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb935aa6d29159effc42de6af4cfac115d86bcbed413c5c736aaaf0c1bbfec0c4. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T11:05:17Z), 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/BEZ352400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9eb009c99679a77e6e471907f48cfc3d793dffdc49a55b89faaa0b0b24c6cb. 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/BEZ352400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4bb72c17f55c6fa34b31b09ca827b8d6e798a29efefef82b26b4e83921be6b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:29:22Z), 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/BEZ352400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd267d62a92830e1fc8385e0187cb7b042f935fbf295383bd33dc0af8a43b4956. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:08:26Z), 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/BEZ352400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0653fd842dc68f82f59a0adcc3a4f6fd1bc228135310e5936073ffffc2d5b7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BEZ352400088.