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 0xf99212103dcf9ad9d4c8c05329999daae20d7375aaf00090046d014b0400d43b. 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/f7a625f5-4721-4835-b4cf-aa2fc66bedf7.json and https://artists.proofprofile.net/proofs/artist/f7a625f5-4721-4835-b4cf-aa2fc66bedf7.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 0xe860ef558de104aa61ca44c9c73c2b2faa04ebf45e5983d76b398ca0837fb292. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/US3GD1412331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dda2c861ed85a314be2517c7fcc22a045bd41b1dffe46067035e6d5f605774a. 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/TCACE1554815.
Burden (MrFijiWiji Remix) [MrFijiWijiRemix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557e2f7bc30424d94b2af5ed996cc3959049053242c34da7c0190bdb34d5d022. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USQY51725651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fed71b47320ef70e7dd690787f3a3e8b4d3a12c83243295d9da2ad72d21c714. 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/GB2LD1800825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1451ad37e75d99c4fc93f6bcc4a3e935a37accd0887c2a1436d2effb88a40ece. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZES81885935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ed1242b516f4ab607eae3f179e56df9ca8388ef0baded43e06293c690ed93d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USA2P1961834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b3b33252ad8f279f5613380cc50cc64166aa8f6d779266c6b82b192a9cfe29. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USA2P2231713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8800569b29025a26cad87434dee89ac901d17d3b5ac23f306eae8d099b880846. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLRD52023082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ab530150a9fc951311b961e0f264178b08c57d24a2859788282b129f3b6e6d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA6D21700143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836dfb66335c9ebb7b01e07707f32a5eec18bd13723ed8cfb6693303bc2ffedc. 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/US25X2202667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7d5c0da299a9947318ed152b2127c873f4a11a3a6dc7a5ab7f6de0d83f8437. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA6D21600315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddb99fe93d119b93a15ae44c31ac0c4322f024acf600b4e991c96c4f66a8f5f. 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/CA6D22100506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d10c93e3929a546a6ac50364c15552f4f1da0c1afbdc753b68a57a99b11bfe1. 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/CA6D21500511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e917f2464665af33e3ba3426a2ee9fc5213df6f4423c0a6fe54414743a523f. 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/CA6D21500281.