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 0xb26913d701fe8ebe928b635a064dff3f0d6edda3405d51a4c758ad88959454fb. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b8074e4-7202-408d-80bb-e0438c2ee87f.json and https://artists.proofprofile.net/proofs/artist/7b8074e4-7202-408d-80bb-e0438c2ee87f.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 0x9954a267d1107dcc6329c4f6adf7651efd43542a65168cd866f9d2a68dac5481. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH7812353682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af456883064b9e84a03d8b56cd1a78cef814054661bbabb84fe9a92b4030263. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU2319450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8b67be4f8da067e36a9d499877a3d9ac3185c327036b9412f30b9d6f113d74. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZS672261605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb4d1fd5d8c0e5514041233e39676735716a3d7fbb9b4dd9b1979146d9726e6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLRD52419128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59017decca58c256de42b15db7c98319f0a7c05f3466fb8dc60ca7a5fe489067. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GX8KD2413712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0075d75a4e3481d430b6bf27e2ed8362bbbe5473667e458233be665f1ed4895. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU2567905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc04c1955e262bc42a42adc64bda1b50e84ed5420ce210f94aea2c7a4cf5fdd8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKQU2540014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550e7c330b3f940e9ac2ceda7f4cfdb0c70d1d4a213f04555b6575cc25ad98e3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLRD52500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71640070ae0f885fd3161ef3180f583c4728b3c87102f060c9acd18b1eb4aa72. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLE712400714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705546443ff4d47f2b81f2bb9be43cc5581112dde7bc51edfc31d1a5bffef440. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLV62400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe95704fdc09256ec727ce9f716fe02eed9571327811b18a49b422558726dba8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BEIW12400637.