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 0x0540c5baec56dd69de240e2c416716fd622a107d1383499c212bac971da62e8d. 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/786b96ac-a9a0-419e-8a75-b05e98f54a53.json and https://artists.proofprofile.net/proofs/artist/786b96ac-a9a0-419e-8a75-b05e98f54a53.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 0xc4934f8ef7532e24ce062212515cbdafffcd2a47526e38cbf2242269b074d194. 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/SE6QE2439538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6233e9b5899e7d5e91705217af2c594868597cf1e27e2c5523c8745cb227e038. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZK6H2487483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f034bb19519b293384910c3575e5897bed4b00293e8bef5fd479177814b0c4. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZHN42430328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5140d004ceaacf68442cd8cdc7ab722ad5b0511d4900c0d182935829fe11c96. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZTB72362647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdc751f87b40e8c6105875e67972d49d91812307c3b57c78ba31d11c2697d86. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZDA62360188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83e3fc6d793ff77d623826e12c8e97ff88ac12dbf0be9c24ec6b105ca2155ef. 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/QZK6L2147104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb929c6ba5a49b7b01d24dc30105d77363a74e6ccb905ae28500ff69c7142bd8b. 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/QZFYY2190830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b3618018fa050a3f99267037920295d632b51ee458df2fada32e7ccb5fcd3f. 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/QZFZ52033163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3d2cdea344babfaeadf033cd3c063289f5e80ae46b052633a8a1635d0fbb64. 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/QZFZ32009228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5163532e19707aeb493a8e201e2048881433de44a6cc7d1ba5c74f92849da22b. 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/QZFZ32009229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7355f6635e60faf23f2afcef2b293734f3fa5eb101289f56b4dcebe329506e0c. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZFZ32009230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8a0a442ba9a77adf4eb293db887f28319c85a78b538f78c38ee516b2a6639e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ32009231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca71029a78f49919596396ec45f7465c66778ba0c6d8919eee1ce7f1665d268. 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/QZFZ32009232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4becf5b6fbb9ffc0f5a5802137f991afeaf82d3be110c3cb551174ebda607f. 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/QZFYX2085642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde50c3daa9144110f2892ffa7f50ceaa41b1c8bf739b2d9a349d1f513f121f05. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZHN41938761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9323933f2395d045336d243278ffc6ecb3696ccd983204d63315824ee030018. 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/QZFZ61975548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd12d4e9b96af79424be4587cbd4b0044796777d6a6a2e82328756a76ee842b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM2PV1850016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce07c24d9d3e755ae34f03254ec0fa67e578a86a2a4e38427718b00d47c171c7. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZTAZ2313016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00220afbbe8ddf9223b057070018fe5c5240482708ffc05059386aa26faad55. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZTAZ2313017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34403807a9be35f9607242066c8d30d5312f45a8cbc311c14b1fa56f6b67242. 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/QZTAZ2313018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac194f372873d79fae2820323acd76df942db466ac5381377ef4ee65340e82b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZTAZ2313019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9491034ced2277cc5ec4a740736734a140939be8900b0664a431fce36fd43e0. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZTAZ2313020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cd72bd29a8c2a624b50f0020a6c3995d48c6131094b5e6bdbcbf77ea41c7b5. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZTAZ2313021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fd6c17bd25a21cd1fe929d91d09fdda2093d911af2d3e07b2c3aeabd8a3857. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZTAZ2313024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274598a55af2eb63997b5c6d37e3fe5091a6770f321300d4efbe0e73ebd8d0bf. 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/QZTAZ2313027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc925f584ea7d149767634d405f905dcc3a4447d6074d3f54fdd68d9184f921d1. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZTAZ2313028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9857b61d70fea58fad797838bb4d18301345aca9ebd17edc979987412bb7c6. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZTAZ2313029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe16fb0ef8949d3e95b12e23bcdb7af9ff52ae639b16c7589a239a0506a830d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZFZ21963362.