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 0xdde03c8bc5fd68b1a8f6031a032865f29dbdb2ba4385b0402513ac16ac79f68e. 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/d9187ea4-855e-414f-8db6-04d58d07bc25.json and https://artists.proofprofile.net/proofs/artist/d9187ea4-855e-414f-8db6-04d58d07bc25.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x6996baf2679493a7fcc4d247075cadc700eca3540ba2157ea910654ddd54c227. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGLS2035444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ec340d2590712df6c432da8131648a3bb3adf7c71876cde49d0ad0f44e5814. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZGLS2035445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0310e6fced7ce84428e64120ed75889a892f3bc63480a44bf4b78247fc76b4a2. 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/BX0L22300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60227c2f805c0e71a71c7eda33e3bea4a4027b7586e1e9ff96bd93f153a6c01. 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/BX0L22300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920b0c412e33553248956b06ad5aa54e3e0e9cb25ccae09d69a9293663d53718. 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/BX0L22300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ad262a81537511fa0e06fc044a0e7471cd60a497d1a530210e61a352aa1e10. 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/BX0L22300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c17b34490493e8c35dbe77bc1af52370daa104cec7e994d067009a7c5a5b76. 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/BX0L22300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257461defca8606905834abdac170e4ca22f52b8eb0edf6c36ff7b2e618f03f3. 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/BX0L22300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867227f331f0fb8deb69e0cfe49ebf1d8d6cc63574aa7a215e208e3d1708f08b. 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/BX0L22300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f844ca192c7ad19333be4eb925be05740ed4caa3ee74295933c3c637958ad7. 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/BX0L22300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a136133af7ceff24a43d1862902f48527f7cc983d8d57b4c0f0c6aa56165df. 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/BX0L22300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba752b9206206ec1906a5fcca138854931ff55fbe9527ae72a2cd4dfc967975e. 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/BX0L22300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fae54f177e4ee671708462bcfd489bf24ddb1c8d8d57d0caa5f1abd556cd267. 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/BX0L22300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c40d8e58ee4f0893eaa5dccebdb922f62913eb524e15067b39141caa1f8a42. 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/BX0L22300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ec38beea2fec1081fcca216bc309c71becceb35cfbb1f5826b0cc151960cad. 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/BX0L22300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a0c8d3bc00644cb2ed048f81cae2590b153bae183d86ada95c32feb8eb861f. 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/BX0L22300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0ff67280ee299f77fa13a1d561125402209162e8d901c97c52234af4111775. 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/BX0L22500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2535159ae99cbb481c22a358f26ae3403c2c2f0bd1f93693946bce2b89d95c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/BX0L22500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622ecc0c22e9bd83a09296139ea0862ab3afbd6221706a23860907bc53ec0912. 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/BX0L22500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd79cd518d96034d08d5bd1830609a0ff159cbece739ad07ed83316d8659ecd. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/BX0L22500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15460d3779157d6d54579d137ccddfe04b359e921494317c7e1704f8ea8cfa25. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BX0L22500023.