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 0x2b956dab00e00856986308c66415ac41a030e55d4227f67a56eaa09162e6741f. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef222398-9db5-4ad9-940e-b09f00e47ddc.json and https://artists.proofprofile.net/proofs/artist/ef222398-9db5-4ad9-940e-b09f00e47ddc.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 0xd5aca94781047adfcdbb849bac7e8224d3204970c6bd891d01e606e581a3324a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES71G1701912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede0fe18a59300f11a61473cd195fea2d5d2e4e17d0c7cacc4fb422bf2823e0b. 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/BRWMB1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2ae2e678933235e7a2b807b6615ec451880f64052a3b65fbae255a341330f3. 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/BRWMB1800618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa687c7e45be0c200bf2c474fb309be6b5ae35bd5b9ef57177a5230f766fb10ee. 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/BXUBN2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e20f871b835424fd28308c51a7f72b4f763146d4d580537f357acff8b90660a. 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/BXUBN2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8118ca4d4f352759f1a1799e21e552b3d69326891e74cd0cbf3c3fb3fa9e4b4. 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/BXUBN2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea6da4b611a8572a3610a1279da46e0c92e974acfa8bd4fffde54a51b2c725e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BXUBN2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1746a2d48fd0cff98fcbbde91cdef35112c856d5df1f7414d4da475cee3e9622. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BXUBN2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b62c2b30de9daac684028f1128e36b3519f296de40e6395ceaeda8ff35b4e7. 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/BXUBN2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c32141d94d77c55e0f918de5666f0392ccd21e575d25df78ba0869b0644153. 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/BXUBN2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4187562e915725ba4a891ac2f6a3ce266fa0c77469320ec1a7f05d4a5662c94. 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/BXUBN2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9031335ee2d3eb75798931d33f5a3099013edab4ba1c6664f62bca0032b01cb0. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/BXUBN2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e45be3506e2a85317efd6b6d8ad3f99486dc7dc3b591d31392e9b233e9b28dc. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BXUBN2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97e0452f6dbe4c0332ec529948e1b0f4f62d35f3ce0e30bbde10d5378bf88ac. 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/BXUBN2200012.
Pras Bandidas (DjCasDaGrock REMIX) - Bonus Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf08fcdb38d69fb4882b36d1523a0b91eaa970fa3f7f8a32e1af9a088329150b. 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/BXUBN2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146887c81e9ee72d3cc953824a4e01be1ccb26e3641e5a646143e32fc83ae070. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BR5TG2400157.