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 0x01b389fd2852c7793eb68e930023241ba31db85ebe3afab7ef9f7be0fb17c4f3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8ee8be0-3d6e-49c9-8def-b668c1ab381e.json and https://artists.proofprofile.net/proofs/artist/a8ee8be0-3d6e-49c9-8def-b668c1ab381e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ec1fc8b6ed7b91f898baf20ecc853f8c854175615113377ba1c4589b295698. 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/QZFZ42169085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb4df9b81f8f9d87bcf7755cf1f43d8c68c72a3378dae27533e2e95ab6b0436. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZFZ42169087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90924152d1682ff93e628cbfc45626b996dde04e28cf8765e06d0b0c12e7c04. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZFZ42169088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698759e0723125c9b10a6ddc176aa4aacdc50b7dd33c146f84fb4ccc273cc628. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:24:19Z), 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/QZFZ42169089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26ec2cdd9320d3cd277e41540e31374f627164543c0f967d314794479ab0179. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:28:25Z), 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/QZFZ42169090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4322b52f64723e07a38eff2495d62a69722d0c162e72d1289e2475ea51287491. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZFZ42169091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86aabc81a76a205dd8e5d2ebb3fe42e7da4959b455fae61b1b94a8afbbc6e004. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:29:35Z), 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/QZFZ42169092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28dab2d531c6aefa8836a07d6d66719a155ebed4146595f338f699ab6173766. 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/VNA0F1794323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d1bb1b14523462667c20f0684c801cd6ca8640149515c34734e75c12161571. 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/VNA0F1794325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa466763319bd1a2503afea8eb37dd844c2b565e3a882f378a0dc9f9b46078388. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:35:22Z), 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/VNA0F1794326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c16989a2b2bd1077b0ca6b18769ea5b4e041fc72f6aa31e6f90dce0cff1139a. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:29:46Z), 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/VNA0F1794528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c602e7bd1920263d043651f050ed45e89eec5daeb654aadf784a9e03a0861c. 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/VNA0F1794529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c68935e7863b90f4da4026d79dad0a62ec016888eb08b12cb6b80f88abae91. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/VNA0F1794705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf58bf2149de397ce18e040e0843c98d203945db902334ad4ccf839ddf909d80. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:33:31Z), 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/VNA0F1794709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f214f319a11083df562b9e16af3d8a9eba3a64af8d02ad6ab3f79d9ab14ae3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/VNA0F1794715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014b08c088678af21135acc0a4beb53532e029d8452aa68f63a29626dbb4761f. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZFZ42171522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5485a1dd4ed1d474b170a3fd753cd6698f15b85cb0580a5b8244e4b6200b8453. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:09:43Z), 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/VNA0F2302311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d71a5cb053db12f75dc41ddd3b36ea63135e709c6235645f8777f374a47373. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/VNA0F2302312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f967e2e026be39b28992d63eb44c7208b47819eec36d8fe2aeb10acb284d59. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/VNA0F2302314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d6fdad3a81ac634983b883303b2c2e6d9cfc4d5e9677ae9ef7da02bde34adc. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:24:54Z), 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/VNA0F2302315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6071cd735694df1a33a97cbc557a24c0deebde09b740084436e54dcf6b378310. 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/VNA0F2302316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95b12137078a49fb4cf36fae01362f8a6084d2687ada80009265539a444caee. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/VNA0F2302317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcddd9df8164c4f2a2e363bba5ead00ff93a2859278546592b4799ecbf4fbb2c2. 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/VNA0F2302318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9564a376ba98e65e9897d0c46523f626ce4de9e12fafce350a7f33bb4e8e28. 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/VNA0F2111552.