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 0xf0723e833755a25ab2ad07fb0eee512ee911006e6c42e915a843e8636d35327d. 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/3b1e9044-ec1b-4834-8d98-a6e0a58d3ec4.json and https://artists.proofprofile.net/proofs/artist/3b1e9044-ec1b-4834-8d98-a6e0a58d3ec4.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 0x3982c9d77d253fa96ce11f6c8aeff4fbdb06438ce8e05184421ee888529900c7. 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/USANG2453388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897a58367bd0259529a97e27bf8e28f46e3a3dabe7210878031e0167afa22d97. 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/QM3DF2136825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec33cfc1907922ad3edfb643d68dae99df990ffc5d84609db35861ff5d7d45cc. 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/QM3DF2138399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26bfa16b98a36f15952e32d6b7479e445350d188f8f851d16d0d6a42463d06a. 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/QM3DF2138397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4906670f32464418af7dd078d2bf58169db6a4769b71e33ebce8e23d4c500913. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM3DF2138374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300359eb406861f815b104bc448fd39a57b36d69cb55dc2a4a59fc277ed14cc3. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QM3DF2138376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17c271c92ea5b0aab3655419b747d32698561d377e623846f47b72fc7c6a776. 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/US3DF2517649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215416508f1f3cf363d9f0efc02a02eddef2f3666d301dd2cb18d9adaf9bf7e4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US3DF2540388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc748b6201fcb253b07e8315ea17e94181ec569240635d9eef3f3c45ab4533b. 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/US3DF2508815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ed344b1647b21fa2ff7c3e79f1f87ca330de8bd53b95e470cffc155bb09e3d. 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/USANG2464316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18456acc4987b46e1f78f412f32f99eaff40c74eaf22e162806214cfe196c0e8. 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/US3DF2457074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fb206605df10dd80a3e7cce244d56ab8a9343640273a582fe23a50bd1cdfc5. 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/SGB502392804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b10e71bbae050e7d6954ac377e4225c3a6a546624d876775d651dad9d18c90. 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/US3DF2291295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6003da4cdad1934c03e002bf18740f0bd7fef840830d0f2ae44f9cbcf991bed4. 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/US3DF2252828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6c5606497c4f4d67aaf8c3d4ea19fae88ad684bd8bcf9f2c14bb3f9c9cbb14. 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/US3DF2106031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e9e2911ab14cf71c90a47848ffc3701d21963fec3afb544488e0aecfa6dd17. 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/QZK6J2120030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8496881c716a843cfca461b639d435182540bdf91e67287297dc302851cc58. 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/USANG2264062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35118a2dc7a6cc284793401b2e434cb3275f70aae49ef8d98f8aa7363de4d5d. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USANG2213565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c6c586caf921252666af4bd1b845f27b59e41b0c877c47c1ea312bd42e229d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USANG2128403.