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 0xacd609f21d756038061464c645a80d2a4a09dbe2abe29ed5156b20b1beb1c5b8. 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/115503d1-455b-40c8-8f8e-c1f532b16794.json and https://artists.proofprofile.net/proofs/artist/115503d1-455b-40c8-8f8e-c1f532b16794.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 0xb18020385f5ef1f02825aecb2384bcdb2928a0a2053b57c300a29352ec167727. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAENV1945488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e690e1607dd4fd696d841428ce66830501af778667bd1d84f7464604207381. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/CAGOO1954953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0e37a9d3bc4e3c4865174dc28b18e947de87bd7ca3319e9a1d0ddf1eda65f9. 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/QZGLS2017393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ac29d30a5183771731f9b7d1f07ba678705fd7f12fd0656dc6a4edaa590202. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZGLS2021486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef936d6d4d97c894e31e668e22595af4d9d0e35fe25bb9b1435905a029affb2. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZGLS2021488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2f4140f073afb3908b71ef7c2378c5742d63ecc3278fa5efd16eba8baf5a34. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZGLS2021489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678d5944445ffc21ccdb93b8e51fb57e0705a16b2fa6ba59f756de601efa8826. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZGLS2021490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308835da1de1f6d0eca9e324beaeb377663bd3622f3a672dea5951c78d99c190. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/BXQ7A2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a966a61482f47ad8a772e9ccfeb7b6858c15f08fec8b940074eca50e65be0a1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BXQ7A2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858a1a56f2ab618d03f6b04b1428e9a8e55fe5dc3fde86e722b357fb5fe5d5d3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/BXQ7A2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef55149877161a8752d6fe15e384ca5df776e734cf923c8471d90b640a478ee0. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZGLM2186504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784ccd3e6ef99b55f587dc1a6f5fa71fcce9120d94e98785b54574bb9e7afc34. 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/QZHZ32123512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79493f76cf5bb24b4fe122516e32028d01b1871504cf157e9bcfc280e75be2b6. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/BXQ7A2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277c00d1348291b3a8cfdc8c8194e2b0e5f952480f9c5081217c7c5c3838c1ae. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/BXQ7A2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393870b825fb6f177e45f6543d23fa7dfca28bbe860bbe410e252dce02c392c0. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/BXQ7A2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442cc507ca56d685040dd4f75548df67c9801548524c2bbda67c82e7f09e47e7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BXQ7A2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc18dddae7640e2076ae3201f9bbc2c43e7fcde0c4c99bfb745c43a36ba8df80. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/BXQ7A2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5030dada168f9a1a8cf93bb73e4870339c09497b0e5916769f0cab4b34d295. 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/BXQ7A2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a4ef25cc4eaad794335d76e804a562dafbfc8f16f0997bb6a1e77449a2c22f. 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/BXQ7A2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e98681d7aa4f328702492b7958e1a47daff7ca5204d8bd044a8ee2c9450704. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BXQ7A2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98d7938660022e21874702bfbdb80a4e64b79707c0c0836b2b9b38e12e6325b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/BXQ7A2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c434641735bf5798f7d4cba93a73f4f0da3d5cb4c1f58b2efa83cd4de56c279. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BXQ7A2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37766cf91db412535be936d53eaf011952e1a782692f09d1e3ab0eb3df6f110. 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/BXQ7A2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d80a33e3ec2cc0d379d86be28ea3040c14b6a3b628115b86ed6f49357b5e5c8. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/BXQ7A2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f96849853938c060245ee1d946228740a40ced003affb8e7d4f7ac54893a46. 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/BXQ7A2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a43f2a47ea42c793aebe8019756c821e494c3c451d570b62620952869d2b83. 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/BROOD2400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c30528174a0fdeb5efacf80d2066a60b8d6b241853444f399641c5edcc052f6. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/BXQ7A2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25a87c8aeee8b42584fccc5119cce621ffb6b139d8cf3c87e5d533bb43ab24f. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/BXQ7A2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaf3d38c04bb285db680bec1b290dd63a167c926d774d5c245e5e887a08c3c4. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/BXQ7A2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b82c6d5ce0a12c0b7352af2cdf7d31bd72b06066fbda1eda252bdb887396eb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BXQ7A2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b003a7e35d0a65962030e307c2b2a0c0e859f7dd2e65cd2c1e252339e655ee. 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/BXQ7A2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341d16f55a10078cab551f10fe7e1f3b25b9b82007964a3703a36ae7fca71f5c. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/BXQ7A2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e6d86dcb89c85196d04e2e41fd3701751e4a0aec8cf34bf3b9c33be883c91e. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/BXQ7A2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af0186301308b0f73572b1bec761cb0830ae33447f3811d5d0043052af03b49. 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/USL4R2092569.