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 0xae81287adbd033db24e352e1899092620350d5b0729062ed171e5ee8f6d07a29. 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/d8d3324a-8629-4d41-84eb-7963a13d1f61.json and https://artists.proofprofile.net/proofs/artist/d8d3324a-8629-4d41-84eb-7963a13d1f61.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 0x91ea686e473be21c34682475ccddb1c329e1b9dbfca8062b6b7b2cfdab59a8db. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCAHP2302491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8afe86f690d7698dce88ad10bd9c8d6b481827f9619d06bc0d2f8e88b6f6c96. 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/TCAHP2302419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb36acbd583d25fbc248c769b56da8eb7ada17fe7ff5ccf79cc93f8b76493b15. 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/TCAHQ2302519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeae5bc8968d086f6df71ae86ca5659e36af416116f318ce46d5be90e528ddef. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/TCAHP2302581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4defd8ff37cb37a26e3405bd116d3948540483c09217926c06673974801b2bd4. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCAHP2302541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35fedcd5f80587fb43f5e114dab5eb8b51df285418ae0d9277b63c5e360bab5. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/TCAHP2302697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892a897a36ff8fe9a9c4b1a5bb9e682ab11a25b7e855ad59ce14520e57a1b802. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAHP2302646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48baed6c11e07f89a5eb97c1ae562095de34b23750c2014e44f2000a24f807b. 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/TCAHP2302718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cc4040fbba18c656e78f5b8d599cd05a2aa10854efb2f254718069852a6d28. 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/TCAHP2302669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf2781c763b439bfea01a1dfa6cec32eccacae52887d12e37ef75a5e8acec2f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAHP2302680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b61969903731c70eca13990eae5fbd96de287888f0368b86a488784d80e737. 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/TCAHP2354225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5aff657090066fb6f7a74b3fcdc3537c597679c946176e327e04d7baa3a6b51. 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/TCAHP2354366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387a97286966fd5b29f1b7fecd5abc73b9ef051b271523293aa16b6115d3cbf3. 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/TCAHP2354447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d735c643703ecb5f4c52379da41279f6711a6ba25927db751bf475887f3279f. 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/TCAHP2354263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ccaafd6a3fda0bf9b69c0701f023a392cae4a05d6ca929c5c298b9ad7d2269. 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/TCAHP2354403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453c343cdedf5f7c71365d8bfcd4cc60e7132677864d618f33f45cd0749977dc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHP2354424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7047a248e9d88cebc7d9958a88baf182e5e13dd66a72aabdbf67dd9e468d0440. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAHP2354472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c83edd78f3e02cd4f29e5b7f1a087e322fa6edb01298902c59c440bc606dc1. 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/TCAHP2354495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29340a182574bf9c066f5619fb7407905131ebf164ca78986b9798199f9b15fc. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCAHP2381269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641c56c16d2daca82a633476601422f7d8dbb70ca284ed2b61d8f49dcb69916f. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAHP2381246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97db07d5d4ca8f3c4aa91d85ac83f4f8fad49c08931586adac591dd6d4105e2. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/TCAIA2477433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93661031a8e0309f9097ede47ab1e831c4adfbd2ed484a67ebdc56bd16501108. 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/TCAIA2477342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbeab8828aa2dc98343c435755ff6b29d5735293b219ef2990e717145f8fbf6c. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/TCAIA2477389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c06157f2e0528557f64f670e0bb3bfc94c99cb8e20f4be013ab8c03e46fbe1c. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/TCAIA2477480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6481e79c7d9b87efc37b6b9885d0df90576be5af5b6ef260322450d610d66f30. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/TCAIA2477518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a22ec9ae49ae7857ed877c5c7a38fac078935011320c4df8a6a5a66008ea867. 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/TCAIB2410697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05995b8484793e2eab94a5668d639bbfe16b1e8238e7e79bd62ca7eb72fe2ca. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCAIB2410574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799fe648ead257c9f45f65d01b78f06d9b8e136bd4178d2ce2477f0f7a62fc5f. 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/TCAIB2410624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476b30fe2a6ed5f7d74586b2fbc323614f38ded12416c20135e5569fb2093104. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAIB2410605.