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 0x92a1884e680dfb256b852b876ce5faa1ca6e6a127a14c0c739e3920ee3389c9d. 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/e155d184-667a-4c51-8cf4-0226a5397a5c.json and https://artists.proofprofile.net/proofs/artist/e155d184-667a-4c51-8cf4-0226a5397a5c.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 0x77eb246fbaab203a70a2617a771810e67b3a1701781c20955a3b85a90a3cfd9d. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T03:01:13Z), 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/ZA8PL2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8430fb2d7575d39fb83c1bdb038739c3e74a65129137a60e9ce8115515e44a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ZA8PL2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769c2d6dfeec9edf881c7b6c2eb7a3ad6d462f9e0c68502fe882b4f8b01be2de. 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/UKXN22321703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1743b17dc6801fa87f63655d4f56e84e313b1f269c9d190081b73d1d5ea7bd. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/UKXN22321705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1eddc3a78af6cf36a71c996389c6f9fbb1f80575a079f791286ba055f94313. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/UKXN22321707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc5a8be70c8bf51ae45fdbb3b817ce406090bced89f60e43cc7737373273e60. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:00:38Z), 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/UKXN22321710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdff4cdcdb9fe189b196199cd26631fc8112fe5ee7a00d8c46952bf00e94e17. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/GX3Q92514508.