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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ca2e8719089e43ba3838e30946e5c5af241db38f15bcc9c1174132f6a91389. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96e9edb6-c385-4334-9ee4-b390036e9948.json and https://artists.proofprofile.net/proofs/artist/96e9edb6-c385-4334-9ee4-b390036e9948.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8745770df91f074d39667f72a0cf7fcdc3e96d5efa928c6c74aff3b498bf2b9e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRQT61400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6276c390612ce303c9e262a37039d5c85b4a9bdd4c17dc277ed6c709349948c5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRQT61400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f9e8da828f370a1ac69be99ea82ff8f51a5ff5a89ff54ad143e2b906efd71c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRQT61400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc31f71effeb5988f3020a61733220dc8a19dcb2bef624522d0bd9c13d4777cd. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DEAR41432527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15bc007f594f55fe31a3d91a2f939ecb5984b3b9bab51752c23286760aba512. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DEAR41436892.
Let Me Say - Andrey Exx & Troitski Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6eb4f0b1b2d85d91c010b693c6e7771a3bda1a29fde753174e0c6c48d1d141. 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/DEAR41436889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2793fbbe95a017c46047c3f958d30f978722534a68851cbf9d851cff87cefc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBENT1330186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8c737142773b0a460b5eb77e4f091e7ab391fcb55e108b5cc8957403a6f7cd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBENT1330187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778ace48a3f78583b9be18878a5f02cfcfc3ffa8120fe2ec5457c6489780de3d. 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/GBENT1330188.
Crush - Erdinc Erdogdu & Ali Arsan Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c0910ca8d70589f6e4e4b1574d80986f431d88abbdacea1ecc4c9b7a874c63. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBENT1330189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e8cc4e7a737361b95200949f426a8779ea15131f01d8e1e5a1c6d080da2b71. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBENT1330190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec13e112df4652ca194877f3f6ff4ed3e3019792da90a4b15e5b5a55bf09c342. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/GBKQU1601566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c9ffea535a838df8084326b768171683b2a8ee5bda4cc84eeefd7a3be71800. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/CMZAT2083301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6033145a70ce85721f0feb7c55c02c6480c7fbd22265ce2e25b72a617c4ba9fe. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US83Z1505974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a315274b0ea14bdb79bfade3cb641804723245628576fbc4f1fd5db8839fe7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US83Z2549464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ede810fda89233363ea365c04fdc28c0b68c08f738abd082e43c498bb4c25f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBENT1330385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fafb9f79373029afa0b434c94ee5651d6cb405299d88149e92087f6002bc1ad. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRQT61800019.