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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 0x4d702b2001abb1498a9379a6f4cdd7184baded4a1d1f882e18fbe6d210d87c58. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/414a293d-387c-4883-a48b-e08d65df5342.json and https://artists.proofprofile.net/proofs/artist/414a293d-387c-4883-a48b-e08d65df5342.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 0xd9766eb179f19dc2b6335a50e5375f00cc1b7875da877f65523a4c5de1e8b049. 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/US5UL0736173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2b44bc9da0795452225b2d2ab18b3fb4b021857ac75b8f872b5c6ef387827f. 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/US5UL0773422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b779b78846871474297d7b709720860f51aeccbce75d739ad684d4c1c48afe. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/US5UL1154787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c816f4664982de4c63d880fd9374397011c28dfc2ab977ba0a52eec92338a9. 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/US5UL1038237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b69a3251faf77f6e223fcfa04838955457690b62a1d0e870c02c2d7fe439f9a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/US5UL1103091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ade781510d971e6c085f9f25fe6a646994bab5d40e541dd7b785236a3d27c3a. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GBPS81513049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee575c4bf6ba465cf6dc4d218ae7c44480f9a76cca0b1356004906c1d655def. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/US5UL0694969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00823452f148f481055567e5b678741e12f2629c1b1dcf5eb1297a0cfafe45f. 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/US5UL1103792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55876c7c6a738926d468cbb133fe6ace87c58a8115cc6f77d6f93e076207a5a. 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/US5UL0693095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563977c2dd510679366a3764689d26e9d8e7918aeebba38a6c8a421211f57506. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBPS81513052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296edfc59cb5418dfb0ea442e12377a2dff874ae2bf2926aab37b4e4d5260675. 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/US5UL1140959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423a50e6bf900b7856793cc9cb5528417fc1b4a46388cc0e9423a7982bd4afac. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US5UL1117851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7443c3538e3c1358fce2281abf8e3fa02ca5aa240380ab55527f8a81edfb8280. 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/US5UL1401842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd1c4114ecb1a3ba0aab5e9f0e9d9463010fca9ad16223659248f4e5382e64b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBPS81500694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5993472d9a0018ec82f23b28965cb441ee795ad699454acf9325e5ecd6aaff. 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/US5UL1226769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fa04aefca855e7bd3bd1982114931b4a76f47a8091035aefc0189b6ef7219b. 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/USY2F0600204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7af5a9e3cd9687b7c36135f78dcd8f8003aeeab0a3f24e080c88587d2ed0adb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US5UL1103076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01ef5ab5b092c2dc4ae3960fc89fd719b6706ce07a6faf144e873b80ebabf13. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBPS81513113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c816f4664982de4c63d880fd9374397011c28dfc2ab977ba0a52eec92338a9. 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/US5UL1038237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99026724cbb685aa977dcdbd902ded8911fa94568b5c2aff37115176496e2b5. 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/US5UL0726551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2168a60ea423713146b704840cc5907dc8f4a42b00aefc2e76b3810d1ec8fb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBPS81513100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cf52303bf6480e71d8169f4a272e9f356464a342e10499bee9d07bfd8a7950. 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/US5UL1250607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda79a1006a4eb5f8f7387a30729c7996fa7a7c6e6795e11d193476c0c78ea894. 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/GBPS81513106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17e3115b447512085799a3ef2b72215bbdfd99cda7c089242f1bccde7e015b1. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/US5UL1250562.