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 0x6593b8d23aed1fd9eb2efa38d9f1320b61fbbb9a4fa86c96e9186275ac6d28da. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89f39b08-ae89-4aa6-ae3d-f48960e2ed5a.json and https://artists.proofprofile.net/proofs/artist/89f39b08-ae89-4aa6-ae3d-f48960e2ed5a.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 0x83a1b20b4139cb4cb5d532af09110b257970e9b259ff63c225493929e13eb27a. 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/QZNJX2334463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1348afc813a171a857baf9f6cfb27a347e023f41b5efef36a67dd291026fdb. 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/QZWFH2569112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6282b36819eeb1fc804e1ade37c5110f2b4ac1d48e9ad2d571514a0f38000db1. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/US7VG2455647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4a100af8b502cdf80e904701a4ba5be739ed7a2872796e2138de92ad49d8fc. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZ5AB2435758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae6d1f4a54b9de7e32f3c8a0338e46046c7e178c4061cf613b7ab4290485c64. 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/QZWFH2569113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b623d801ac5497592e1c3d62011b50ef8b2c4695e3339b634d7296af12fdfd. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZTPX2411704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdbd0687b2dd5d2ce269caa89d63e024d32bfc42b9e695d2653009c7fe9edf6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWS2588497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97c80ab4a37a50fdf11277a95a974b8957c47de12742ed0629f6fce195d7680. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:09:29Z), 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/QZWFH2566588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60ef88c8e0acb441bfb826a51d77f6817ae748e1762f699a4c48953d88bf51f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWS2588493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca78433739e4652fdd3934f27fc45025c914fa6d2f9b8f22cc536dd7355a06f6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEN2508083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cae45457a75436328bcd3f6261a8e3726c0a32a7250d5ab7a168b2e29fbcc84. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNJV2591740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9c7ecd09f87473bbe97caf4b90feaf21c8bc7dc262822b8632875ce81a4d89. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNJW2530348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcde926ae48b98fc4c54c37ade7504ce2e8b83779b86d636db20b0acb1a4bb75. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZNJW2576362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b27d697191ad797fc7acfcc5b26ed0899073c8f1f7ff7cd7f9320d3c2e43fad. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFH2569115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3261ba76de136e4d09c2e9b3d0516ad0d7bb3b825c1826d915c52ba7801c0d. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZNJY2414776.