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 0x5f52c17788b7d2250a72b5a7b716cea95b3cce624279119643b1bbd8847b11b9. 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/5fc958d8-08e9-46d5-ba31-f5ee0e9b5fd9.json and https://artists.proofprofile.net/proofs/artist/5fc958d8-08e9-46d5-ba31-f5ee0e9b5fd9.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 0x6c3105cc44de98e6332610f2e72e4386cfbb1908df1612d8029529885f435d25. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/DELJ81953817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2be447c7dfbcda065eb1136aa834f2e211647c8ab8dea50d3e2d37b7628961. 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/DELJ81953819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4ba0ec279c379e64ebae2bbbb50477a781ea3843c59d67ca2ab592f559dc82. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/DELJ81953823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec81ccc7021a8241bfa618c8ab3005ce81f32070aa5a3dc47d204e27eafa42e5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEZC62204906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b14d822b68230693f0eff75fa8d50b1e5b1ff13ddda8aa32e69b7f7d24d1ea. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DELJ81905370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1075bb2da0a21f3e964bb97b6812f5a8b6637c4777d834c905dc5c048d79862f. 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/DELJ81905377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f6fa4a12da49a4c1ad4bd7f4973465d9732acfa64a0786c7108a1c6f73a666. 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/DELJ81955334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dbb5be5679e7c5081f0607c888d12d0af7367386b97c5b04a50780878588dc. 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/DELJ81955335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507c776f1f4edc793d3b48d1baae0b1a70c3dd8ce37ba4f0ea72fbeddcc1e34a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DELJ81953841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3546f25d24bc4be6cde736934a086afc77a72cdada54089d893ec377aa8efb2. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/DELJ81953724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c1e186cb37852a961dab7d14584c0116ff5ff6b4eb28399d4674c07eb1219a. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DELJ81953727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9222a19748348375b4b472f0dfab7d0ed5200f48dde6d215949eba969c28f265. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DELJ81953728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3ea3a264f3c6b06c7c2db85c9952f1a96f8356f4bce4b9661a22b568d50ad6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DELJ81953827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfc262b541284b46bcfd8cdadf0508061b5da69349ca7d944aba91e53726671. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR96X1698220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c9ab4f78d5eae3e4460d159e65723c14fbe448f74d95a8e0c55f078469eab2. 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/FR96X1698221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae44d5d0460280cad7120dc4ea5dca1da768bfc2cccd45926eb160cb342b019c. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/FR96X1698223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf518ee9429e09214e1b38986d38ff67e077f7c3e29bdfcaefe4374c625464823. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR96X1698224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5b4b09b935139359fe9156c8d9074c8de5678824476c48612345985bdca4d9. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FR96X1698225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9289de0e2a7afbe3aa91d9509e65465aa223e59086ce7c2dfbd42ac400fc6bca. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/FR96X1698226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9851cf983321c7afd74227a665919e11a773cdfa9f1cba134a5be77f2855bf1b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/DELJ81804990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba3477b005d0215756106608e9186f0b3dcf3fc0819de8eee3b7b809586044a. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/DELJ81804992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373ad98a66c342828bfd367a21f52d02b93ff61d788b92b682c590d38f2d5117. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DELJ81804997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0555a734d5fdca8250b32aa7d4ee47a014593dfaf5b84901e55c0cdba2f0308. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/DELJ81804998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef4010fefb2c6fe6fc221612248c4ff5251f12db1718dcb73e8bfe904cf20d8. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/DELJ81805001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d347c0f07ca31528207004e41a0affa09bc4b6a7eb1dd65e78c390f5fd5fbb7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR96X1698218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488fe68e19d25bbaf07a8618fd0860910b50dea0c0264fff2852ddda7cc23b5b. 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/FR96X1698219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0e46a5ab56e524c020e0f11ba0f6f59807f11599990a3c55f379cb7f6ef7c1. 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/DELJ82018611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8852d98d5eda93fb6ce0383e0b7f555e0a98120b7e9c7dd8a1772e94985d26. 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/DELJ82018612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efe770f86fe46911fac7ff2aa364cf1f9df96e5466db3fcac34d718a7f89929. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DELJ82018613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d51a726b0e2eaf9434697e13ab3653bb5e4b383a538b2b8258081f313bd1dda. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/DEZC62123474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42046ec4c24be263a3e01c72ac0c8e4d8bba16033bffd03d7f88ab0b0a9bc6e. 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/DEZC62123475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b38351429c6d5836ea7fc48399d0ce11bdbb4a022ba409cb6713a6a272893e2. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-15T21:33:28Z), 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/DEZC62123477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677870719e0fe03490c9bfde199619eb7f19d3e571ac9c03397c27e041b21c36. 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/DEZC62123480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f0997f8b574bb9e0378216b572f48af12869a1e9c7a5ba45d7d69e846e8a4a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/DEZC62123481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96e2c9ac7419690ec5307ed0554ac39c64dfb46e73182a0aa31ab403da0262a. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/DEZC62211317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439b429b81fff09b654f27c1c4ca6846e98705e108b5d5614b766220f8000196. 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/DELJ81953818.