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 0x2fa59437c11d5f887688047d983faf00f02196471aeb59e8b4b4b1cb95c9c83d. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df9ed00d-41ff-4fd5-86a9-cac3d8967a0a.json and https://artists.proofprofile.net/proofs/artist/df9ed00d-41ff-4fd5-86a9-cac3d8967a0a.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 0x57a987f6b38a6c7e3256e120a0ac4176720be020e41ea1af52f7e711522ab532. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/BCSUV2300233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f362920bd4854a0a5e146480fea9859cc3dbb8a33c39a682af9906e9adc69b. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/BCSUV2400237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da585d045c60373af38bde23c3aa59bb12cd64db2af84ef89c1aaf6841798a6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ILTON2400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cec470bee1ad2126d2d680c3abc98f2bf7277fa5094969cf97d4d7ea9ccf06b. 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/ILTON2400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4ffeb32b7a7a0da0fb0096ec5818e11ed0197394e53bf3fe1eab405c9c8eba. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ILTON2500778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a5ee617c7a7552f396803d37b4b075a37efd347ad79075c17f934299d8641d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ILTON2500780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8650006a044c1faf1e458e455a05162abcb76d96b70a0c30346900b486385a16. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ES48F2500876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250ff39bd9d0c8af445e129fb2772ed08448bb3cca271558efa516af5170ea77. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/ES48F2500877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff328993f96df54b830390517c3e0f9a02aff767e48aae04a24bd632300cc33. 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/ES48F2500878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f769c1a5acdb9271010fcaa40e3b4d275cd375117b326be50b033da01ca68c7. 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/ES48F2500879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede8051e8039ba28a66013cb14dd11b9acf17178272b39cf4daaf75b26427007. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES48F2500880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2901db0ac33dd3f2944c4b24370076857c8e784da917d9127d21f42055ac41. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES48F2500881.