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 0xaa2ef593c6fd557cf946e4762efec496e02c34587443209bca31f0b16c936233. 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/7e8fdfdb-8716-4da5-8ba0-5f88784e7b20.json and https://artists.proofprofile.net/proofs/artist/7e8fdfdb-8716-4da5-8ba0-5f88784e7b20.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 0xf1583ca402e1a34c127ec9766a09e032b7af005248455e0dde15db8879df3652. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ62198546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34655dd45f3cd28b3445d2511470a80f8f0517fa4fcd7b41afe79d51cabb93e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAU2159354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8beb497370c5ddb3d7a65e58d619b4731a2bd8088f91b80d30fd84c116e40813. 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/QZPLR2292044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa9b121fafc6cabb822b958ce478d5e22c4827dd775e067be2b693cf4df3248. 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/QZHN82307864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2871e6276e8a186c933268b6efe29329491370237181c376d5de86d1e81d21. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWX2389479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37b16b338b4a248099ac5fcb67790cfa9e5a74939e5fab91888ba2a5ab404db. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:11:24Z), 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/QZNWX2389481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0536abe5bff13fcb3234333c57ba8277e06cfa52e1d3d812821e6276846a01. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWX2389482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbae379e4725ff30aba9c6c270549e262f2fb3d233a08368975680be80b00fb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWX2389483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa202517b2e6030a508f5fdff1fce52cc3a09f9d8438582ef67e625e9ed5ca82f. 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/NLRD52339365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718da230a059a114cfb8fc6e5143c29f12b25279ee5bb265649611b2e7bca3df. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZK6J2433558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f660d515f0ce0e07047f1a97de605edeca38097310268608551c93b9e85f8fa. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:51:35Z), 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/QZPEW2535089.