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 0x66a20076a58c2b6ae024d11b777d0a35d8312745ff21d4d545e392c60a1424ae. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55e1d7a6-89fe-4010-a07e-cf8e861776e7.json and https://artists.proofprofile.net/proofs/artist/55e1d7a6-89fe-4010-a07e-cf8e861776e7.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 0xa76f6735f03ee0e94fa2b8c7bf2afad9b285dd054fa88f3f56e8d55cee304df3. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/JPB622401302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0675a073f1419d1b883f960e39380fdaf4c83d8c04b3e38341a1c70260040d4. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/JPB622401303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9224dc694f77815e885c83f43886685c08b002ce751f17bb10249b9a1a3a1b16. 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/JPB622401304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7e56a11e11000b23fe4e8ea04d390a3e99c7592c9577ed5caaa2dc0ac6372c. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/JPB622401305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479154667baad30d1d3f12136bafccc623ceafdcdb1960128c1ed4581f558588. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/JPB622401306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8f831641ec137cdd49494897912f6b4084571b71125a3ec81eb43a394fa5f7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPB622401307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9202a1d9ad8f3c4ccf1b1e69ffcd864dd58474cc8609b116f18c3e10f9ec5d. 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/JPB622401308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff95eab6437ad35d5bdced397956f15f4c8ee58624ac6ffd9e55b609fd72565. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPB622401309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5c2640e0321e4274865b70feccdbf55f6a5d7b549e2506cd3fc423291741a3. 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/JPB622401310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b37da3ad322066c0017e57fc82a80adcdd297149291bf23d7d2113598182ed. 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/JPB622401313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6859fd2b1af4a7debbcbac17651f4cc564cf56b7e3c870464745c5e1455603ab. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPB622401314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ca895d6f2f595e08c9f9923d23fd55af05074aa631459b90461a1d7bc1d0bb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPB622401315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b47509cd7c7c1f6b70ac3764b3d694cf0524a01b24b1923ec16cc2623a8defc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPB622401316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd61308dbd4f590a7439ab44e4b58d8a2681efc3a79905f7b4615836c5a80e93. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/JPB622401737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a9f4c7d999b3b3b50c4be1a2069b94d2298cb67b66c4c22afe9dd64ffbd7fd. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/JPB622502364.