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 0xa108de4acc14546181c712cebfdecdb2d9726887b729b661316954c3bfddee68. 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/252b5c3b-cbea-48f9-ad0a-020654836c4d.json and https://artists.proofprofile.net/proofs/artist/252b5c3b-cbea-48f9-ad0a-020654836c4d.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 0xfa4ae5df8b233fec20534c691846bcf9bf67c50a6af3503ff71c5582b3e69a14. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMEQ2298135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2315f9b72cf92af3037b136c88b51fef1e2d9977902d45d49a0087cca83a68e. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:04:35Z), 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/QZES82393017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62deba3f410cc995f6c70cfc51498966168a65ec72b87bed13e181609b588da6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWR2394286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fcf32e77308b33856d2b04b2f9a7a60fcfceb14fa087daea1906ac215fe337. 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/QZTAU2308505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7909aa84271292925f414be674210bdab2b0741b52558647624d09fac9dbc72. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QZTB22314709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530f8dcb4a2c9cac3e93e524460058ca19999aeaafe66a32d88f2c5f5c9590bd. 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/QZFYX2463512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5e3a1bac0a4674e3bf3b6223864a56056360f54d67dad21f7820268bb3b661. 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/QZHN42467822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bf713a78fdcdfe2694a5dd63c54a964708590fe4696cd605e0f50357358c0d. 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/QZMEN2459218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecd30d7a0efd255ea6f47569ed71189af80e65ac01f2b2330683abfb0c8a16c. 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/QZTAU2420178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ac4d0bc1ef3a6792b42e20bf04b2eb066d60d88421d3a57eb68c61c2acce4a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTBC2402604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5491a508fd9807181604771129a413b6350c854b24bdcc07e0e664bc5d54de. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZNWZ2524155.