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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae446dc2d25f6a2e666d0eb2cdef26acf37b58153a5e47c69cc8cef7262ef7c. 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/9c2b3ecb-cd8a-4f41-a226-15f504b38118.json and https://artists.proofprofile.net/proofs/artist/9c2b3ecb-cd8a-4f41-a226-15f504b38118.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2257064f73fa757111fcb7463106998a714d8637a74203587698a92f0014346. 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/QZP7F2286379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb4a40e1488b027727ec6020d85de428e7028be4d73cf431a012821f262b514. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZP7F2286391.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682a3397f69351939669d5d04e02bf04e919378c229c73d49f24a42c540cf3ee. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZP7F2315385.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae8a65b9dac7f681c461bef13204f901420a6bce8822cbbe274e0f3f6b32a18. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZP7F2368889.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd967d3f49a6ae0287d24e78afaa0a741d18eb1cec25ffafeecc3aa0f321526e8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZP7F2368931.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9186b32dc501a7a4ff35becdae72af975b7c2710c15f773cea1802839f670925. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:43:11Z), 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/QZP7F2368944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a82500477467d9dd23c0502e021f48bf13b1519070073ad2fc8e800033b3128. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZP7F2368945.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dedcb96962a662b1cc16366c0b17ac6b0bc9cf7076d8bd5ec1978a8cbe6a31. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GXC5E2423877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb989fc742196541ce07b7b985f36be1056a90d316a6462b7a36c4edbc73888. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/GXC5E2423878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8b308d33c746c35141905daeca0018b495990d7435ebf0e89b8b6bd700d28b. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GXC5E2423879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e077256cfcbbdf18ac8d8d52f809d159d7714e6db4fd27ae3da347d8d712e88. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/GXC5E2423880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ae26ad62aaaf60198b57a8078446dfb425b338df6d15dd3d0795e7de2cd8fc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GXC5E2423881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d738e7d8db75f50179a1812434f9d470fd063db41023e500358b221703507f. Chain 2 (Bitcoin): anchored in block 957634 (2026-07-12T00:26:43Z), 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/GXC5E2423882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6737c37679e89a665427497367d97a01cb1cb96953c1e7ebdc9613d7aadbf0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GXC5E2423883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2638af0324fdad0a80376bc8ed43597e116bacaafb55c95897ef4667f65e4a0c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GXC5E2423884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d41032e025fbe466de8e136dba4c3b8b047c68f0409312d4024bf0b1f53069. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:26:36Z), 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/GXC5E2423885.