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 0x869fd37ecf3a21d951cf1d56cb4a4b68ebd580af24371272b2e796907c5b9be6. 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/3c63463d-42da-49f2-9d23-75a2d4c0a5cd.json and https://artists.proofprofile.net/proofs/artist/3c63463d-42da-49f2-9d23-75a2d4c0a5cd.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 0x7e0a7a7a7015e86a634555c8a3ca9d5d9d37382fe3a07e1042be64030120900f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GX8LD2491897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f11c9d20cb8253a3dc73404c2c3580bae71fccb0b7102aa6aff6e8a51106302. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GX8LD2470321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6d5c8268801b78fff0bca66391c0e421eccdb06fa53791c6cbba41675d4900. 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/GX8LD2455544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9a6fabf35e5bb37c9c5fd03a1f40171e80cf8c5e08e8f0871369fad2ef22c0. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GX8LD2490733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a98d42378676749aa4b85f62dba2b610dcb10cc5846cac40a560a536ea8ca3. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GX8LD2451750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20dd2231d8ddd24a843fb3490a43c7595fafbfab1887b439931d1249ad342d1. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GX8LD2489355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8bc6d1645c4d211b07e0636d9bc1a2fb927355061ac3670c555af6b4601b96. 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/SE5752411719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006dc85fe38c2760eec04f97da56ec6f81fca4c47510b8b384a8c4e55bb1be11. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/SE5752411722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e536af9d2aee3f2a95fdcd2a1d1cc4844d85169a6e950d0716a6f9dc638a398. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE5752411723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77f79dc9803b0bceb786e5ad827686c7a2bbdcf8f8b7ec6614b685c1a1b96b7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NL9KQ2442731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a781b1a02f4b79f4cba99e53570bb41c6ef32a44965734d765d229081748465. 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/NL9KQ2442734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4cb754e4df83480ca4a87d41661949141ae8263e048c210ed60f366dbfeb87. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SE6XW2409908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b3e601b571af078a860793ae32aa275485efba74812b6c3efc1f370937b505. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/SE6XW2409909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd493594e556300c838f0a364a0d816ad3692a4a60f38b37e0619b5cbc26b8656. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6XW2409910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747c28842534e5f4f3c9d680fe5526655b4e196338b70e1747084d0cf185a6e1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/SE6XW2409911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04acfde652fe6377cea12c7dc9443d87e755a9ef354b8c7a1572a2a32822e294. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/SE6XW2409913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef70de6efa0078c436cf3b924bdce8011f36529d3cdbd3b11a0d8d50b640466d. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/SE6XW2409916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991c988a1ab3680202556fe56f1f09176c75fb8e06490d5e8d0214764b4ec241. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE5BU2531149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52523e56858e9dddd5e50a4ab5da2a9dbabc29a873a3d26332194d6e253f1cf6. 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/SE5BU2531151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47683a290e547bdc2f78b64966245f153da3ab915fdef6191de2fa185bf58e6b. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SE5BU2531153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aebedeab6daf1052dd7849ce79d18735c946b0d615936f97f42acfcc4b5956d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5BU2531154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8701fa40de7407ad316640ec4c9293521cbb742de16cb153418a189a1c20d6f. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/SE5BU2531155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bca3afa87d9a0f604b67bb50782b6590c54422082f07ae2a0b645314c27866. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SE5BU2531157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c680383f0bb9dd82679a30337b08d91073aaa0d91dff5df958bd7adcf021b5. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/ATBK71202243.