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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ef134e81889a67158c1826801b85c614f06f09e50cc9b70a916ee7c7a4ca70. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b57aa29-296e-49cc-aa71-ffe2625d301e.json and https://artists.proofprofile.net/proofs/artist/6b57aa29-296e-49cc-aa71-ffe2625d301e.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a3420dfc83bb457a6c9d43885cb099c3b9895dbbaa1c0956f8abaa29f1412b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SEYOK1950248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8194cccfa1fe09f5273bc3f1172b2efe3e6b83b50f25e562561a878b55efafeb. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/SEYOK1952098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8f9d53b39f721f034cc7f9614c0369f4a2a51ff6010b373dc9173ef63079d0. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SEYOK2151334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488801664cbb3a09b18bb014ce2c6ff8ad8f4ee4c8ee8f005d9222b39e381165. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SEYOK2153184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabe78cd00d6b0cdffc0c0a3734d956f57f5cae399360a9689dc8d880ac33bbf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SEYOK2154059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9955c344ed9c4fa19be005868d6708dc16a498be1ff488df061dbab89931daad. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SEYOK2223759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39dbe0cbddcdb0e4120940afe0f56046351ec5126f9b93f780dc2c17b651bc1f. 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/SEYOK2223963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb88843c50b041b3b66aca835d331efb19d3277b23a08af94ef6cd89a1cbe286. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SEYOK2228861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed8c0dcb3dbc11a7692a6e92a4258dca89248e242f5140ca9a85a074e8b717d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SEYOK2228862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde742092344701d994f41c965e9e6c4cc24e9c0071bae69d629284d4ce0af49a. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/SEYOK2309261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1c7096558ff7c97bd23ac025fc9e84a86b1ef650e50e047c603340b23836a1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SEYOK2309885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09c8371e0cb6a0220e93e2818d27a8b1d8be51fcffe7e2761ffd9e8a0fe1cfd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SEYOK2332991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e0d3541c7da6b7d8b96a91eb3fe4c628c1d6f38b8b9795631ad92a385bb7b3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SEYOK2333919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec2882e1485aa777864cf24406575e3394646dd6a46c72b7fe64e2c8cb88dc0. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/SEYOK2414797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f17992847e11ca5bbdcc82d681070ff2e548f9b3752009591f64292628149dd. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/SEYOK2427479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c7c26d8bb3202cebf447dc70a792b30e70329109518de61667962dff044005. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/SEYOK2505053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbae52276b572c74d219803063d93bc61e446fd14bd06d3878d5e9f5e1279a8. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/SEYOK2507605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67480fbe814fc01bb5819e7688d3b3e641413531664b8c33299fd324a187784e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SEYOK2517889.