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 0x18e58629443ce79e852fe881a26335dcfb0e3e86e15ad6bd9c0fbd480bbbe411. 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/d8d21386-67ee-4e51-bc49-4238d20ae3f4.json and https://artists.proofprofile.net/proofs/artist/d8d21386-67ee-4e51-bc49-4238d20ae3f4.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 0xd3607698959cbab56757d9b7c42e128fe9ae9c7350cc1e390ae9411ba7ee2aef. 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/QZES52209706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde15e9143872ab2349b098570260648e435d5291e277a71158fa8f74f720dc40. 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/QZHN62247470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2a1e3f96de7434c385b78d20ae9c6a728fc92301377e41c17d49820338e268. 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/QZK6G2260294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b0def208575f83a61dfa4a958456e8b0a8f4215e72c84610e73b1d980cc609. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWZ2206016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a3163693a34c63f692686b1de558242a9c8065584656ef92bb6b9e649c615d. 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/QZTB72296730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c8305221601c1e53daba59af3ff33c4dfa8573492bee83778e648622cb5971. 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/QZTBE2393741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9742207f7214698202ac4b1aa03ae07583ce2f651570dc568be398e29dd0ceb9. 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/QZTBE2393742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c12ff41e0f9f0ec607e027a22e42d86cbe79d63dad45698859785929877e66. 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/QZTBE2393743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbebe5c8306dd76e5e2bf6882fa554093469eb2f12720b5428c1dcbc9b1d9ab. 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/QZTBE2393744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6743e7672b42f46232e12755d7634053046241d2b0f09b4908611b181f75682. 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/QZTBE2393745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7c7733f35ac34f642072b6fc341476b12ed0f3d1f0d30dbb3f661a765b8ef4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTBE2393746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde15e9143872ab2349b098570260648e435d5291e277a71158fa8f74f720dc40. 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/QZHN62247470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a3163693a34c63f692686b1de558242a9c8065584656ef92bb6b9e649c615d. 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/QZTB72296730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138fc0187dc8d401d8505ab88ae64ff7448afefa044b5685fdda8c4e6d25213a. 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/QZTBE2393747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2a1e3f96de7434c385b78d20ae9c6a728fc92301377e41c17d49820338e268. 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/QZK6G2260294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713d721c6f800e6f42087e5acc3f0832ab133f57085f3adc0a71b8907e55a93c. 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/QZPLR2358655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f74899686c82703109e1af8484d1cf940d394ba97b6edf10c8526f3106ccd18. 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/QZTBE2393748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ee805a6a5cbbdf833c49346a94d9a7cf0402c209f212d0e1319b21ff8de51d. 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/QZTBE2393749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658e1f13d30d16abe03ac72f56d641ab6573ee9036164ea7df255972c76da913. 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/QZTBE2393750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058983a5d89a632b7100371c41ac7f0c11fb790270419f9c82fa84648123d5a4. 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/ES75E2405727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d3a71c8075003985441d22ee051779b86e4720c6cb38333d1694421d7760c7. 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/GX3Q92358220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db6249120a016c006c03ee0981311fecdbf2e647e5395a716364727e9e05273. 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/QZGLM2486702.