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 0xe6fa5afb09c9cf2585c176ed4c3d7eee917931b661502f15ea33f34d672b46a9. 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/84b2e138-4f26-4b26-9b61-f983c6bb5098.json and https://artists.proofprofile.net/proofs/artist/84b2e138-4f26-4b26-9b61-f983c6bb5098.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 0x8064b744284295953321fe584c2749a6436d4ad042dc6571ec8ac957e25fce74. 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/QM7282558443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e298f1e46d28545cc6642ab82a85ae07d9e2e98a7f672925714e306f7f5084c. 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/QM6N22422385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe542b274efd71d90a6922c5a2b7fa882f2cf659e47dd7709e760e6b75ea987e. 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/QM6N22422386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5529b1e104ce6bd3f086f9c4c9c815dce8d24ff709fdf29bcc4a40eacc3568a7. 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/QM6N22422387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332ec6a913bb7b61b33c27eea830b4dc25a7d5e78025aa679e71139bdab3e5d3. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QM6N22422388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d893d997e597b9435a3ee5da0c21950e7c9c659f2b966d1367abdca1fba78b5. 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/QM6N22422389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101823daba5d606427efbb3af3919e281f58a602fe9602550d306eeedc3917d0. 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/QM6N22422390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cd7f08919ec27a73bc90c4bdcaa0112269d49b00f69c16de6fb76b0e4ef9af. 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/QM6N22422391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdba71c1301b285a46e341227b18342723155639c5f1ab1d3ef8bbe94d1e2a1c. 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/QM6N22422393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2393f973c011677573d45870889d50d983e623e95f45a64a3c1311979460882b. 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/QM6N22422394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cea1ec5eae0c362ad23d57587036dd64c31bcb2ee9a148085399e6e53506c7. 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/QM6N22422395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b92e3f3d0fb79c8d853f70fbc07f25494aea6d0a1f3c11ba257282c57b47c9. 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/QM6N22422396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8612aa61f2e74f59d9abd36aa3d9044d65f18e49d4301e10dba5c396ef239c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM6N22422397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc487a2829cd9d9db90447740f04454493200aa68b61b15674eb2507cb7bcd233. 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/QM6N22422403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2aa85e8d25b65971c3dbc2597c1cf9d603f0d581af4356c3b3f35e2666f72f. 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/QM6N22422404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64dc97745db7ca8f74ddfcf1eb1bd89c0688991cc74b08e1115cd411e36440a5. 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/QM6N22473490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332ec6a913bb7b61b33c27eea830b4dc25a7d5e78025aa679e71139bdab3e5d3. 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/QM6N22422388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b9121ee20a675da80e3090483ba950131e165565a25407d71767ad2ba86a43. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QM4TW2587405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0d0cc782bd6211ff492c8b7a7d83bbd646b8a632cb404938060f73b84b281e. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QM4TX2567579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a7a3ff99c3830f5a55f244b86d429bc0d1716a5c565f2b31df2407d1a9a4e7. 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/QM6MZ2586171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83611a492c2663c0e03a08b991834675c6daa377abf1345d3a6ef99bd1dee065. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USN1R1905006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fabb148829fe59553a5a9d229f78c0ffef1197240682e62e251c8a1bff26d9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USN1R1905011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741f5562b214817e2a06c9d20b807fad546d8e44e234869874e71a7028dcf0f9. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USN1R1907002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1a7eb1f947c392ab0fc72758b59eca6d4dce511351ccd2ee4eea70d8898be9. 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/QMBZ92523341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b3e80a7e82890cf7d6b2ce108fb6366455dac7972c36367d1b04ca8b4f00cb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QMDA62520091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0229e31b8b38e1b00a2f4b562199775ae54dc85d8de9113c16d1ec6ae7e5183a. 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/QMDA72591063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6516e8212cf7455a7c975554d21ca077acaf18feea6f34745d4f6da27f5e39d7. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QMDA72591064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a9ac47185cc15e990a2b27f424e7833a9843d759dd48fcb6f25510768db95b. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QMDA72591065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb451203e5595a11da328c5613311e9a42c7c96c0b0c3eafb92f6ece8fc0fb408. 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/QMDA72591066.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64247e703f14e67b0bd3168e125e09671e0907c9a360bbcd9c14f4f617c64d6d. 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/QMFME2542309.