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 0x988ba0aa9878f22e180e2775c41b86f6f425906fed6ee4fca6e2e165c85a9484. 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/a6c54307-ce91-40a1-a6cf-799ea7e953bd.json and https://artists.proofprofile.net/proofs/artist/a6c54307-ce91-40a1-a6cf-799ea7e953bd.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 0x4e3f5e900fe5c30884d973793d0596622bcd09b6f92c9bca57432f86679116ed. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:52:54Z), 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/USDY41797842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7a66468b119d3c43e11f0ca8fbab1a1734a4a48e8a8a9a580f4383dfa0d612. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/USDY41797844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6324a89fe7ac05aa8b1c6ca6bdf6e45b508195cb6c4a614c8e33d30fb987b006. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM21730868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0ec762c94d70222224a7089b96686606f4303854fd3ef5def3f9f83b57e4b4. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USHM21730870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad83074e98e8efdace5d51a7f4bfbb8618b39905609fb2811f24f8dc6dfaa59. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:20:55Z), 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/USHM21730872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a6ec12a76ae7818f49896aa13401d0c4fd83d0a8b4e1b8456f975dc366bfe8. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/USHM21730873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca1768900fb5f0b6ddc383358f5dbc91afad5aa702603c64d4e5861865c316d. 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/USHM21730878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebae515d48a4adc3e22c3d0883f4d170a6d76a4a0df99b05048335c0e665248. 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/USCGH1925439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8cba8a9e215509c4d19cefe747f5c1aa5592071a661d203f146d76c9de7141. 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/USCGH1925447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa567bf14df4d417fdacc081758e22d51cbcff08a48da23734030f2e1ebc6dfce. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM21753210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0045206d43b9dc078e420f9ec091d7deaa2d4308c829874b84ece6d608de613. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:22:37Z), 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/USHM21753212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6550f5c6637301be702ad2c72de1b61f6d4484a67e70f4838f0bc369bea88a6. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USHM21753213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeef5d50d2e4e6a7b2356f592a81cd17e47285a672e7510d6b804d7f87e64381. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:16:33Z), 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/USHM21753218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed684e7a6103cda2eaa4b44755952f94f252afeafacdce300b0fe36f78b6c82. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USDY41797858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefdb86520072cfe66fc8184b930f110b9adfe7ed4b6aad5617782e679d66f0a. 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/USX9P2066313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40aee307c62a44ef1ac738ba3ec89f8bbbf1fd834bf0b2453801659f8e576190. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:08:24Z), 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/USHM22108371.