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 0x4c3891c5d7faca401bf0caae6641014af0d9f89abe8c503cc0a1005207fabbd2. 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/0699db81-5d25-4e3d-8585-4342ecf4302d.json and https://artists.proofprofile.net/proofs/artist/0699db81-5d25-4e3d-8585-4342ecf4302d.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 0x4fb5e3587a20d8e0fc083a6539f193a6338d8084be1a4d2a5ab66f7fe267d84c. 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/QM6MD2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf66b9586b8be5ace869b04c465847b3664546c2d9dea05e9e61e5af4a4bb27. 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/QM6MD2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd89d657f694f2460889d3847bc02171a42d8aab79fd7f81e61fc23295c69f65. 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/QM6MD2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b2ad9b0b5e3483010a3a81c34f18202b06da40aea4aeed441751348aa556d2. 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/QM6MD2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c79b219394aed8202bda69081a3e4c8b52a91f657f7b0fa549b6efd5e5c778e. 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/QM6MD2100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd796aa1cf331ba391bb19b332ea4e6291a0e4b075d6de697599b54449a7dc52b. 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/QM6MD2100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d51a002edd2392adbf859345bd991802a98bf6a528ecd2ab3c0f6680f17216. 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/QM6MD2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d29ed64ec4c84eacd09103d6667bed08495d248e099aca020f4878662e9c1e. 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/QM6MD2100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9369ca1cf8e61e831b2a1a6368b166ceb58a5d0b6c6696eac2d779cbe3863252. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QM6MD1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ced793af7e42fd8ae54312e5d82d3d569eab1c5084bba278a7b29991dda51c. 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/QM6MD1700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cac04d59a30ce1c347952e9c2baed26830370b99fe706003accef616249b9b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QM6MD1700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1195918cf1000490fc849834860c5ffedaa2fd39f12faebc00cf98b6bf11b36f. 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/QM6MD1700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8280a2d40139a711bf5256e0ff768c61c9aeaf0b68bcac50ef88d8ce13f7ef4f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QM6MD1700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e535e382a374d2f546a03199df5ae624ae0e7e0c3315145228e4113817ac6dc. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QM6MD1700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16786acbc0eaba14fb3a86930c5de2f6571bfc527e811a46e60947c79af209f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM6MD1700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebe52695bb197752382b03547da5be6d275f63d05cb748fee463c7079641d39. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM4DW1575016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcddfd85e58b0dff9c9676e4f08b371984899beee3cb1a6d4bc39c6b154253480. 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/QM4DW1575017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51893ede6cbf269f20b5f01f21850e7e9300f6ca0451771234b91e91a7113513. 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/QM4DW1575018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19d66a88cc7e5bfa32e9dbef4ba21063e1ce89bc2402ca921eac25947b0f417. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QM4DW1575019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ede7370d622fab1c7fbea2e7c3ecaba34f8d5e4a61d8b6c5147e8be83f04b0. 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/QM4DW1575020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd327d4fd5fa6e4625923273bc3499ce523094d742a5f2c0be6bc696111ca8080. 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/QM4DW1575021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b25f472768d79f90af5705178226841762fb4ee84d680ae35a7978cf8d2ea0. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/QM4DW1575022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e446f4a621b696dac37c1f781be2c1089b24ddec66f488e6deb96d90387b9b. 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/QM4DW1575023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8a414f7bed9bda4aa05b36af38081c28a9ebfb005c6bfc9cf2f11a2462c6e4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM4DW1575024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661c27cbf0bc34a0a313a77c136bd9009167f32b17552ac34a5c738f93e1306a. 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/USHM82397177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd89d657f694f2460889d3847bc02171a42d8aab79fd7f81e61fc23295c69f65. 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/QM6MD2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28d6a2fe966b4015a7d6a795fc2c20e74f983085cc90b99ff15b7365f0166f3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QM4DW1575025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23083ca5226d7d4a0a403785c8203a0084a062d266fffa684c8e22c7c72e374. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QM4DW1575026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fb490b42c02ac0079e792f48af13ed53963f05b8bdde683b498984e85e9f9b. 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/QM4DW1575027.