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 0x5e5d40767022c13a3460fb3ff289e8833178e9c3d9faf7d30d192b38f1b85520. 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/4393f997-376f-4987-a2fa-297cfdaeabae.json and https://artists.proofprofile.net/proofs/artist/4393f997-376f-4987-a2fa-297cfdaeabae.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 0xb7b12d5212c0b4851f64bebe1ed7b81c7006f4dc0510cf764f7f04c8fd877b62. 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/GB8HK1202241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64dc7ee7e079824bf0931547a06f925261e65b86d1c48d7765585ef115f7e18. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GB8HK1202242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96361a760ff34a91f6e6b7ccd01c5656aa6861a7e2281c50a40895203fbeab6e. 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/GB8HK1202248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363071be266a12405b3e9ec86600431a1b2a81f7c0ef391966182a8ddf6088de. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GB8HK1202252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b1e7e31ffc5e909a72c2858632e18a252e4cf62d098d79444cf8727efa6ed4. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/GB8HK1202255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb414853082888a92f0bc8f6df95804d144db7dc7a7d1bb668d98712936361063. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GB8HK1202259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed55aaaeaeb70f6857132e7d238b0a94285c47203befc1edb177614aa2e770d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB8HK1202261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb370a1826697b4e1e71a6a4071293a2eff024ab63a899e2b4ca6d21f4b3693a9. 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/GB8HK1202262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bd0cb4b4d4272aa2239168a09ca1390ee9e1977a393164d1ea8f2a51777a9c. 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/GB8HK1202263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a054dc7999e667b7bc3856222624991f6710c08cfde8d21b1de01c0d78e0e04. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB8HK1202264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10f59c44058cbe4e9cbbbf38721fc6cf2e78dc57b3c3affa56deaaa10c58b34. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GB8HK1202265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9bf8085d23f59bb0517f0bfdd1fbcae1db7a88a681cfbef39ec51ddf14461a. 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/GB8HK1202266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa289a16609bb679a606b69114e5b09afa425c070380b2d206477008f3f7600. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GB8HK1202267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947dc9e3ce34d1405d5fa12953883bcb0789496220829792bf40c5754b991b51. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GB8HK1202268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc197561706f70bab85fd9e93022d20b396b682584cb4d1184e4b542b7b67dfcd. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/GB8HK1202269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa355f02124ce67a594c13c276ad9b0593e8328261be5dd62798c56ee9e0c06e. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GB8HK1202270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc852d845d3a16ed2b51ad06dee3da05e98f673baff74f0a6b0af41e1db5d254. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GB8HK1202271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31146da9794d7446d486f54a6bc54bd354cf0f43db8f12b260efec488056acb3. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/GB8HK1202278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3fb0ec2819ef4cf3c69cc844d2f3d252bf59f5355deaa34b5293bf7fa0429b. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/GB8HK1302681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef08cdfa6ad4f91af8f8a68d6ccfbe2d3c3ee199a0026e501f598c6c0ec8d7d. 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/GB8HK1302682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88e9dd79db583101383230dafcded697c8d756f1fd5e6d5d33281b0356ed9d0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GB8HK1302683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1880c70ee0393535f84912ec2cf0a6a2ace49a7e8dbabbba3a83dd9c8fef09. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GB8HK1302684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2660d615deab9aa306bfc1d2a7350437ba8d06af9534ebbe9ceaf26aaecac4. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GB8HK1302685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0955197824c4cc5ff90d1ec3f5a0b03da6b503977435343fc0449a5d4866abb2. 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/GB8HK1302686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f4d7fbfa16ea2bb98353c55d3324ff5cd2e7bb3e0d6af42f5c7cd8b3f1a9fa. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GB8HK1302687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20538c592bc4c5055fe4488634ec525a884e47d1afe015e345f3c4f203c876e4. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GB8HK1302688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4851a5833029385044ebd40678717461adfda538da8e5375bee83685116f536. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GB8HK1302689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1322ef58010183f23cd3d588d3ca407f3ed47e854499751c39650becec4e709. 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/GB8HK1302690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb070457f6adfc445b2ca4beac175eb537a89adecd6c7079a4b196ec43c7790ce. 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/QM4TX2537267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c0b55c23282f0a2dcb9b288191be1e141abda4c6cb7297dab27b93e46ba5af. 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/QMDA62505777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef58866ed3fe69eb8be989c652b25e5673472b473428ff72270dea6360c451d. 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/GBSMU4214215.