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 0x04a3eb67260a78889cdeb1995d8c9363f05c4e5597d22a5e5b75ec67ad0cf622. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67e03eca-f436-4e7a-a07f-1a3f6823f695.json and https://artists.proofprofile.net/proofs/artist/67e03eca-f436-4e7a-a07f-1a3f6823f695.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 0x955aff336f66a1ee5c57c32830434eea00bb98aa2a658cd6f69e94fd12af9873. 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/TCAJT2586595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ef853260c30bdc51cd0da059cceb4170c36676f8eef9df5eabd762a57dedf0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJT2586609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4ccc1078b485be3fb313ef48048186f9b119e905124751eddc639434ca3381. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCAJW2520734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354372f52c2abf91ee04e1866caeb80629734c7eb7be484aa8c3e207650d8c76. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/TCAJX2554591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d5c51490a12e6b61d7671a9cac0ae1cd0cef5aae5d639c8ee357dcdda783a0. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCAJY2507396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71056ceb6151814d571d2417e2a56dd696084b4391669a18cbc455ea52942544. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:37:30Z), 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/TCAJY2507414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f36b176a6c57ff2e0c21b6d15d43ffe689347a3113423491299bfe31392c64. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAJY2537304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2647ae53974a55673f4f7fe19d778fa94df4da52ea3e9ac9cce24684122e87d4. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/TCAJY2537278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb759a002de1061142a37b3dec1506c31dbaedc1c43ca94618ecaab8ddc72b34. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAJY2560920.