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 0xf0288bd3f14a70645bc10aa9e8301f3b8a99b846beac68dc9031a98cc7663171. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4adff5a4-8dbb-43f1-b1ba-6f68413f3b27.json and https://artists.proofprofile.net/proofs/artist/4adff5a4-8dbb-43f1-b1ba-6f68413f3b27.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 0x149dc6f6863b6b8c7771919caa814f868403e40cec3f3037417a43c3a8d0fb7e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ5AB2364498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c91ddad3178b4a0c519fef820ec6837582ef6547cbf6b2be51580215e7f0ed. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:39:46Z), 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/QZNJY2304369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c9224c79bb1a8e794dd1048cbd04154e95f15913fa4f517589f95bb0545c01. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZZ8B2369048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bd8a121e9efaca9596725ab8ce0cebae16ee21bf8594505ab3f09ef131cda2. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USLZJ2448900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86217b5728325cdce2b02ac82717d69844bc6653d48ca1ab7e4821e5e6220e1. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZWV32434903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbd4dd17a079ffb6504e8bfd423cfeb5a7f31b8632dc9b41422fb0b842f3074. 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/QZWV32494786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0778b4238a41d2f6820cecb4798794f2f80b188612d61699b8e4566db6a59e79. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:22:10Z), 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/BX9ZT2500141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c51bc17f4b94ac53f6a06d33ad5688de9faec67e7725c8fad0443910f2608c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BX9ZT2500187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c519d6e6cb8cb67fce29a4456f302aa914bb9ef309465bf8cb37c4c8e3de9d. 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/BKCMX2400310.