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 0xc2039760b6b203ca801683bbe36f0e97a59808fdc2c9cb38d04af3d2bccef55f. 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/8576637e-9a27-4816-9687-485197604256.json and https://artists.proofprofile.net/proofs/artist/8576637e-9a27-4816-9687-485197604256.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 0x517775958beb60dad89293243268c36348a71d0712040091455e76f70bebd6a9. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/CH7812533813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b95398d80464e2e3ce97635dcbfe1030fb40d13fb38c581c2a2a0756a59fe6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CH7811923763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86dfd7fc0fdcc38e820ee22e9ba81c2a7350e48ce1bfe9afab8afc69e4b5e00. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CH7812348960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8914107262de87316b98b3396ce53601e4fcc28f7f57f82e33f6f20c5107cc33. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:57:32Z), 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/CH7811931091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59193ff675a4f7a14385b8656b975d4d2d3a0a9ad968b4faffef51c5cb483a0. 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/CH7812037659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcde89a3ff31b211aede84cb3ec41ab5c80a6ad3b52a24316419aab593420f2. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/CH7812050967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff0469aa89b1f6d95733e5f52fb784208f8d8c52a7e252690d0b42ccbb3a61d. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/CH7812050966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ba4fc4785f2783c06ef6727dbdc823cb6d6397f33674ac4aa76ebb66a4c82c. 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/CH7812050968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550ea2888334db70de951ce64563d12327a2232a4c3e720d2b9d4787be9f7b18. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:46:07Z), 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/CH7812050969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745c1c11643ae97d28bb267a4a11b632fddad46e272a4eb29da6f6681db1fe11. 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/CH7812060647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bb6612c41e5eaff16fa6866acd2bc38ac8660e3bc205fe245a5384f23fe580. 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/CH7812066849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edd936afe0a394c22888b2bc1290dcda641b4cd6c12db4a0ee91d0586dc98c8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:20:23Z), 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/CH7812074060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4be56b769328edf79fd9e960327079bba2c6507952e00002c8bdcff509bb7b1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH7812187260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000a489a28807019c919eca1d8044a86d38527e2a7c0915f755079fb617ae05b. 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/CH7812191370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aab3d48ea04db0930f641fc08771920fa053603f086a72b8904e9669487e9ae. 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/CH7812100731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49fdbdc0a9363e61ed1fe4003b35d12bca23e6135e5839ebaaf9d8b585823d7. 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/DECE72200934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e01c38783da1ae1d19e8504bca6dac8d9ee05a8bde71fb81ce42769f8a28300. 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/DECE72201140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9085ee31d0cc075efa4102937f0f5afe8bf19eb90256e7cd8bc7e221b8ab911. 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/DECE72201141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49fdbdc0a9363e61ed1fe4003b35d12bca23e6135e5839ebaaf9d8b585823d7. 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/DECE72200934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fbff82500699ec151b8f28bf702ee79596526c33da731eacc51c774c928acf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DECE72201148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e70937014663087eb286518020e9a69923bc636d2e604e7bf7faec52406de35. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:18:54Z), 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/DECE72201151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333b67b9b763c0cc1502429948048241f50a1db0f40c01a55124c0f2961086e2. 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/DECE72201152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e4537ced96bddae3624362c77ae87de5256f8ba6d3d990a9b2adf25a58e944. 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/CH7812347983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611055e869ff24bdc66f99603d18345b6de9243e431bf9344dc493cf7a252d22. 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/CH7812349700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2e39c23ad884f9501c2b19956c45ee0d4169440b84c64a1ff8a0541cb77b64. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CH7812352444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5632b1b5c1b6d094c11e0ba279b87f027ba54326cf0de24c45d6d3725602f9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH7812403005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661ec075a81dd1f031b855544ffe7e5c1f5c7855e612a31d96f385b263b70ec4. 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/CH7812403538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91eb82ea6ba2d04403cad8a0af5710dfcea4b6ea1c4cd32ff048205bafbe7ece. 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/ATR981338906.