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 0xa0a1378a68b09aaa6f75030fc6f9cb75e54d807dffafe868b31bbe8375df6567. 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/456902f6-2419-4cc5-99ac-a8c39d83baf1.json and https://artists.proofprofile.net/proofs/artist/456902f6-2419-4cc5-99ac-a8c39d83baf1.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 0xe3d36f50efdbb4280cb33a4f6154bd6561d9be7e75d42c9f9c5ad0e6ae7d29b7. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/BK4DA2436755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24f7ad46daf8b4fa5d2ab2aa3e9a39659a6b13e81bcc39f34d4fbb881b67090. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/BK4DA2436750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c67ee491d2571307e824e355d09384e12551f4135153b14e432ea5559e2f62c. 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/BK4DA2436749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d549d69e955ac4460a8365c231892de078ae15d2d43dcb86d4c3e33f602eb2. 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/BK4DA2436751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bddd3fb5380560f9c89cb61644bd1b2b5d408fc61780a80e55e7c5afe54a94. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/BK4DA2436741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88657049bc7d41747fdfb834489eeb48014c8bf6a7cbf52490acaebb89805672. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/BK4DA2436742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fb2db5b0960749c90d8ce7c5d2e99fac264782c0ec512b01381c15b058d6b3. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/BK4DA2436747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb238c17ce1688f765a99e033a768bf3bebcd0a3a38f0a6451423907a17ab0d0d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/BK4DA2436736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3f1105681d9d59dc011cbcd31e6686ff6fdbf0203fa23864c4039accb61175. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/BK4DA2436745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd284f5bbeb5d77912ab2767b5c903a6b55d508c3765183dcc850ad1b03c32e7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/BK4DA2436746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59765a82738d9b28e4c8c1d63bad37c4f5080eb496483afd0d1486bbf25100bc. 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/BK4DA2436744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735cdbcff21163f4dc13d6b71a54664e3a09228f775b7a8bd64b4179e151f226. 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/BK4DA2436735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f9337ddabaea5076e741c7c8967f8fad76ee813ca51800879e40b355626196. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/BK4DA2436738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b824f0721c095c0bccfe3891cc0cf82be5b20c6ea57470911481124e02b8ef. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/BK4DA2436758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885fe230487f50a650eccf613dbb68c948041528e8e5bec0853b6267e1e6bad2. 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/BK4DA2436737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9faab9d2f6bf5f5715d249086e32151bb503518ad4ba6ca8be0ea51a2877e25d. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/BK4DA2436734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fab369681ea4954b8f0555601a7a40adb0564d00dea8317cf38478dd604213d. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/BK4DA2436739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf3b70413280412fe3ff33084e06afd55529bda2c82ec31173b1db96bc9603d. 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/BK4DA2436733.