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 0xaa06ed1074fde6df65fe487e9ac77fb72636e6b61c57b9994a9208f80cee4b95. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9dab33a5-2e67-4479-8eb9-3edac3de8f8b.json and https://artists.proofprofile.net/proofs/artist/9dab33a5-2e67-4479-8eb9-3edac3de8f8b.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 0x655c6fe8ce34108c85bf959b84f381f247b9ee1448e48b735e4cfca797d66244. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZYHM2375428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc77a11da06dd980a58d3da4ebf0837a54716a3c141f4abb1a7cd090454f16e9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:33:50Z), 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/QZYHM2375616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e5f7cfcf10bd409502fa701fb683a2bed3f5d59d38b0e4f70066b3a779ac15. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:31:54Z), 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/QZYHM2375617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192045c761227bae2a342fc875709cbfe3a5ef4aebee54bfc1616a0909eb2338. 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/QZYHM2400331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ab997620d42c100f893ff85e8fb7946aa49bb24106247ae3487df78bfb2956. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZYHM2400765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136c58d2f780059d214ebee291642b8a71efcb587512a13660eb81c3d20be360. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZYHM2401105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd4c2bedab9d31b84b97f4fd516d799cfcd9c865ef6b6f5f608bbff11ae8a2c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZYHM2402403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb466acd16d7082ac88d913b04278b7fbf1e10d30f535e28e4046c9b1cf2b0f0e. 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/QZYHM2403053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294ceebda7f22836da20f2ceda6ef8e61d7673168333ddceb91990238daec14e. 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/QZYHM2404962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461633e917a3dfdc42722454c86f5f59cc0af5b376f34bad1502016e08f65620. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZYHM2406136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24e948cd33fb3e87feb336de1962678bee7a112e114cd889268ba3f905cc325. 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/QZYHM2408737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59330a8d865fee6d8b7ed644681fd73f1c71ae296af3b4a3414fccfbd80b3c08. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/QZYHM2410529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fd6dd4c284d9b91fd410668c9bfb4148cc62dd9eeae6d59e7bb14cdcfc2a33. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:00Z), 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/QZYHM2413998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946686e9758eb2e922230080d0b0f7a94f55e5c8427353d17c56af0e8e68c7a5. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZYHM2414942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ffb2726f93b94aafe4c3f451f39ee35f96f423f71da30764a6b01f3260b095. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZYHM2415687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e6a64c53f6af7dce1575bc5cefd625c2dcbcce6b050762db0ea8f88230198b. 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/QZYHM2415669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3661ae2b251cd290228c3f01dabe5541b77bacb0c77836e8dc8120d6c3579469. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:07:01Z), 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/QZYHM2416023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09dc8422115c3a5a7b435d7999ce46da80897973d18fef9626d4f56c11e04ee. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:35:35Z), 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/QZYHM2500282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3e1b3980d0035417d845bb517bf2e00bd5e0c6ed966e8ae5db7606a6347092. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:54:57Z), 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/QMDA72550138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519984e7c106a5ad8dfba16744cbd237780aa394700ef142a3ee8241b9f45682. 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/QMFME2519882.