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 0x1a23f03ab14135ba7f2fb5d2d2130c27c71ba4b80506ae339226d7f07f8d11a4. 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/b66373c7-b9b3-4d28-bca4-20551414e6c7.json and https://artists.proofprofile.net/proofs/artist/b66373c7-b9b3-4d28-bca4-20551414e6c7.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 0xce30d7f3d3265141951df1ac552d551dea8a6691ba7d5c5abd5f133af4bed7b8. 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/BKSHK2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d9d5edbf32f6d4d556edfc19aba88933c58d8b9cc44af7c6293b80ce75a86a. 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/QZW9L2398261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5950fa1c71ac40f7a617ce8f94f18ab11ad8d7145dd3e989d7c9eb06f9f1c56b. 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/BCP3J2300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25af2698dd9077047d6b7ec1bbb24d11f0418f10d7f98025a63f3bd073ef0006. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHZ31974986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb306f680adf6b8ae69e78aa0c1cc5762f92ce23724cf525126220b728d48f1d1. 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/BKSHK2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8468b921e546f78dd9943d123c6161226b8b2e27ad485084e32d77a005b0ddc7. 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/BCP3J2300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5950fa1c71ac40f7a617ce8f94f18ab11ad8d7145dd3e989d7c9eb06f9f1c56b. 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/BCP3J2300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac92d7b58d37d001aa274eb0bd66c217337eb5b24dc346d8a2feb39f5d05c0b. 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/BCP3J2200155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fc114649004831185326878368b6abb63a2f5428b04001fd205fe5ea28c0f6. 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/BXIV82234259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a1fb36ae7999e258280ca85c1e2e1d3b325761836115c566aa8414476dae3d. 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/BCP3J2200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d67dc0a29d8045f88a13da8913476a58a22818e1631383a86c2fe096e4eb68d. 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/BCP3J2200086.