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 0x483fb9723427b4ff474c70d0d414a422a78b95b1b2a9932a94512886ccd49df2. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f284cec2-5592-45fb-9d77-32513b6e1eed.json and https://artists.proofprofile.net/proofs/artist/f284cec2-5592-45fb-9d77-32513b6e1eed.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 0x15d30d45ca8c21e42d12617c0a27336c28fa56963981d5adb6428ab81c677546. 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/QM6N21759479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d62318b3ddda8f5489389ffcd10385f6a3fa0ac32b686db607db2fc9be08fc. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM6N21759480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af0e8527d83f9227b2f8b0ea0dd7fb9372170fd18a2a8787b715b484ec79d1b. 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/QM6N21759481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82801b36f750ac8da136a5ecf4b737a71c1d2733d2d5db42872affe4531ae4f8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM6N21759483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bec7ed81ea0d133fe28d61e66e8b9c9294e05f2bd1b0fcce8cdaabc9f28a60. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM6N21759484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d4f49530ece1fb29bf1bd9cdad03c5ad8c8c6a83ca4a2f3036d767e0653fdf. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:15:40Z), 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/QM6N21759485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa33c5cc6f0ded6c1b9797547a957c44cbee2be21025c103d0c92606e537d0a2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM6N21759486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32562ee7dc23a9db26c210c4b3cc08c2e6241dfcf48fea63962dfcc60c6e7efd. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM6N21759487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20259039ff6f773d6740a338689c62111fde8061d016f9000ffb961baafe4610. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM6N21759489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b8bcb682cf2b90c597829ffd25741a9fabc23cc32d8259c44e39fe1aad718c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMSAV1102351.