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 0x58debc8764d766a7eff6d0c98b07fc660f002357396648d5db0f7e5a0b9f98bb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/defc8c59-b583-4913-94e6-0f0a43ca4718.json and https://artists.proofprofile.net/proofs/artist/defc8c59-b583-4913-94e6-0f0a43ca4718.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 0x9a6c1fd27f0991c357755f36db59006050ad1361d20b99223414e603a15e60a0. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/UKACT1914124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbe0e662ad1a80ad5ae9315b27971c2799c2abc3b5ea8670e4c0ea8f594cf88. 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/UKR6V2071228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a13b301e74c6430116ffda947f979ee1054e556cd072758d321914335db7c71. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/UKR6V2071229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeaa33fd4bb280b2db9612b59b18ecc70c8c015aadaf26c7a92a588966f0739f. 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/UKR6V2090859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19261fc8989ef5f4c1eef3d08645c22401a5a2ddeb0f11037b960ba2a6a96b70. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/UKR6V2090860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf833d884d1b94da55c43275ee77044e5fb8869d799acccc7004fb7f4031aadb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/UKR6V2092906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf132155ab35c28e0204366302bc01e41f9af506921e8cc5c383958ef5219f4f2. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/UKU932231138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581930657f3b63586b24e2000ece007eede97c17cef229802d6c701b98b41c87. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/UKU932231139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ec99c27dc5f9751c273431755baa2335107a7f6d0bf129f097d214d4359227. 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/GXBNP2420052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc96be6b8b39757f56c198108a1900623201a9924be569fee04f00ed2827570. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:47:30Z), 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/GXBNP2420053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787879b76ace89a69becce8b7bdd5283252c1c8cdd4e514841cd8efe0a7546aa. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/GXBNP2420055.