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 0x69d9ef887a3a4c842917a2daee4ce5fbb309c774535ada1aae996ab9e63ad7eb. 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/5e9da457-c79b-47cc-a544-e6038f3ab10f.json and https://artists.proofprofile.net/proofs/artist/5e9da457-c79b-47cc-a544-e6038f3ab10f.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 0x42f787139a1fc716d882e02f65a6d3091995895735b116baf33d09e7438516f6. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:10:54Z), 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/QZDA82260292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99da681d298abac58743449d8ebf25186ae4e54386057c8375181ad08eff97be. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:04Z), 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/QZHN52261275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cced6b6578d01586083f431c74ddd444551d932405b171467b0f12bd4449a7f. 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/QZFYZ2462296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed70d0696d67cecbbb36216d294cd8a0fc9475954577eba34aad26059c264ea. 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/QZES72417010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f7197ff2c47480f02661805a71aaed4496e65c71edd0d9ad01309ca8643bad. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:43:40Z), 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/QZK6M2487147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bb31b6f70d8a753cab913132918b84d5769c67e0ce2e20c26fba2037f32101. 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/QZTAW2424216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2fa2873f7e2cfc065154920a5dcc50195971e80a6730699a39feed06cc3d06. 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/QZTB82420890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bd23e2977f788473436486e92c573675c39c78e86c225c93baae22e63e597b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:40:21Z), 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/QZWFR2429496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a6d395fd53446bf4effbbdc4a7d6e83f562e0758a2c72820b6a463f545318c. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZZ792456085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ddf93709d6fadff5059ba1931826a8f929d1a5dfbf7a8c6c997777d5920f6b. 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/QT3EZ2444136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840d6b1d325e61a6cbb61fe7975afaf65f67fc20eac8ee51aaeeb1d260573998. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:02:36Z), 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/QZHN92541183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2383451e501c964cad3eb4d8d04023980b6cf0f518c58a6fc4e3448d514066. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:28:47Z), 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/QZK6M2543947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41408d52017b4ce343e703d42ab9a0cbe5b7394775f09659fc2dd9573b4569b. 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/QZK6F2581263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951709d03df4583d00295569eba304d400e29eeb58b85c525f42b77afe3f4f5d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWV2540566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acbdbac6cc44ac01ba2ddba2909f8f836aed58d0699982883ac598e9c9544ee. 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/QZTB52590728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6593d67b38292651d557263aeb41c2be62996b01b302f11bd95f2173a7a345a. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:24:07Z), 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/QT3EX2570951.