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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8e677835527c3aaacf688f3c5ebb5e4f15a15d90c9ed1b065be57ad6206a03. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ba85361-d497-4a77-b3c0-ab28ff9c34aa.json and https://artists.proofprofile.net/proofs/artist/3ba85361-d497-4a77-b3c0-ab28ff9c34aa.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0fc56edd2627ac2ddd7602c89fc8a4727040045b02d3dcf3cc9695e7b38d75. 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/FI7S52000095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98c82f022181315edf9ceb534e55d93bc041061ab8f1edd88c6859bf442cfa1. 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/FI7S52000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2682eeb110bae2ff57ebc82eeebc4e36cd840c2abdee5e87bef183eae3f27790. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FI7S52000096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a739052a8df7d982b36d596f27e4c5e2935b1e0e052d78dc83466d7fe887da. 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/FI7S52000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b6519ad11b0fa5301d1a1ba39b00dcb07160fa1c978aedabd6116ffac0ac48. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FI7S52000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ef4ad945ac72be9755b048f3c806acf0f9a7c0eeac32bfea201f0918d06b26. 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/FI7S52000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77025190cf2265aca129a98e8cfae80937dc480b017095f52361163f5784b9e5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FI7S52000098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b1e851d31735bb2a070697a580f8a20566b42127eb54bf209b69fefb812c75. 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/FI7S52000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2a878d633716cdf6eb43663a16cc9c5c156bea35c95d1ac16f835d7f4d8a45. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FI7S52000099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2435cd3b58be40c78d89b14c376e296ea062ee768b8f529495fe71c9a115b2ef. 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/FI7S52000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0e8f122c2066fa8cf57175228a69d4cd906bdb5856ef75d64a306ce6a40b66. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FI7S52000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9351e8e4e2f298438b9e0eea7de670fcc858d08969d8a29061b5a2e8e13c8c2. 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/FI7S52000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8859d3a0ea3138bcd4a34799987ef1c0e9370a6a1951ffd72acbddbde3bf43f. 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/FI7S52000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f6bbd2e387f953dc77a6b41336a900206a8f0ef08adfa5ce763e38109b931a. 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/FI7S52000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a739052a8df7d982b36d596f27e4c5e2935b1e0e052d78dc83466d7fe887da. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FI7S52000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b1e851d31735bb2a070697a580f8a20566b42127eb54bf209b69fefb812c75. 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/FI7S52000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ef4ad945ac72be9755b048f3c806acf0f9a7c0eeac32bfea201f0918d06b26. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/FI7S52000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e05e76ab46b768c04ce35467fe84d96da362d845ba148112f7b20239a27de6. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QM6MZ2023640.