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 0x50649d499a1d27abae61f4e13cd92597e68b9981c7b3be8c2a83554a8fddb541. 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/774c3906-6f04-4cae-af2d-775c2337e666.json and https://artists.proofprofile.net/proofs/artist/774c3906-6f04-4cae-af2d-775c2337e666.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 0x7fa288e7aac4942b907d2f799323f89f51420ed3eec29ef6218d18115c6e647a. 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/QZTB52210328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078ac6d5adc881e9bd7d40eef7d7100ec4f06f32c55fae761257da1ff321715e. 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/QZTAU2337391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee0d3e6921613d5497482279d18b971e8f9dede8de48851d19b34c39f08be86. 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/QZNWW2556506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d48da5af3f4cc8641a756953b427b25f780a9e76f24127cb1586f14e530e224. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZNWW2556507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c807c550f04b2f415c32df5c83d433127156c0c7270733ee41fde1493378848. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QZDA72465920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061dca54afa9af0f4721795013b8ab13420671b295890a8b29018c81dd0b4ccb. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZHN32571725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9a8ee41d76c91de4dbd226a5387a3824283ed5342f87b18b4cd7ca5d3e9fb7. Chain 2 (Bitcoin): anchored in block 957717 (2026-07-12T14:54:03Z), 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/QZHN42552445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021263aa871583a19d87052814370b584f17e75af09cbaa85e3e56317565fa48. 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/QZHN42552450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2708be49942d517922745e7adbcff7e3676cf0d6d51030ffbe39131b1b9594d. 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/QZHN82500194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634085e9368d52d7fcb9733d170af274bd8f1402ae334335a0a5677f365b7868. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZK6G2528867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5a676e501ab4875110201f3543a33ef010102ab6ba18633f98528f0fefa0aa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6G2528868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35697bd19cb0e6f2a8c9bf68bba872c592f5f65dfc67e8f83b029a0fab6297eb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZK6G2527108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3408eb604ef01d0f6c5c1e7be3604759e253ffe28bf847bb74d5828e43cfde. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWW2558018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad195d7a06e9b2d1a39169dff3344dc9caa617e874dab61f17421a1763a7f54a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZNWX2542306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a57a89bd7803d613dee2fa1977a7284bb533982a32124f3fd4baeeafeaa429. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZNWQ2537904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d278513c9eb4b1f57b1e32f5dc6ce71d9a2893eb665066887f9563a2fd0ca7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWQ2504094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950eec64ccda57cdf327a623cd3709c1ac7f133155ecabbfa5cbef5db0309e62. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZNWU2515632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2a576376423b3b5cc8f29cfd4e154fcc234686f00a4f784c2ca17491633839. 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/QZNWY2537813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8826de9e597c6cd80c01eded4004b3b185ebe8e1d5900bacbf740830a06a61. 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/QZNWY2537814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71b66c03186fa0a4f5f99f25bbcce60df0931be997b70475072110abec00c25. 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/QZTAZ2522959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9f91f2f427ab1a37d984ec8c3f82d68f4bac3275da40c315742656a6f0b981. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZTB92539069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585c2a8e11d13d3c8e2fc9f4b1a9a48a666fc2a06d6746a9dcdc2302262d97c9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFL2527404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2b48a782e28b6b025528a374ebc0777ac1233a07c9bff67a6067da70489e43. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFN2598139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761d2f801d563c5fca9ef9c008f8dd470dba980d47e75f3c5fd6c2686d165f3a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZZ7N2554262.