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 0xcba67b751977d262cc7433f99554f5c652498b90af5e3304bf1898eaaf824578. 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/e935505e-cbd8-4bd1-8bf8-aeb2ec0b2936.json and https://artists.proofprofile.net/proofs/artist/e935505e-cbd8-4bd1-8bf8-aeb2ec0b2936.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 0x2b2a6124a06f92c32bb7a486ba38fbfb462577a249abbe988a7ebdece0adb0ef. 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/FR9W12312116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c149e7834f9bd78eda04163d2bf446e83a808afbf6d09c7e6d54c97ed49620c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/FR9W12250058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a351ba0b1d1cc5479a0a11f93bc91c7a52ed2ee6c82d8c38ad049eb4834a0fd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR9W12250065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75ab93aaeb1a24e77b570af04fa6b0d19ad33ec606a5d0f244bc8cf30d12262. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W12313099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b92ef0f710e3c3517e133daa1d16715bfd328c4bc12320f7336c9dfe291a790. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W12313096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2205f1e8cd37cef59b27beb5711d6e700d5dea5bd9d96348271d708955a50414. 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/FR9W12313089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcaf728ac32c5fab0ec727468580e265128699b389d676160ce30b6674e9120. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/FR9W12313093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05277cf09dbccbcad872c34870f0d97d47ea516d5a7173ebad55fffd1c6aa79. 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/FR9W12313091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37794fc5b95bf190fcc702cde24b2fedd1f3c732fa3680684bbc7406452d2280. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W12313101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675215d43d672d5184b61151654532313528423a3afcb75200359a298365c82d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W12313100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daa52e5b044777ea9ebe0a96416af538099f2e56487f723e0deb85c017447e9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR9W12313088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa157e69f716f827fcc12230368daa0048f86859e86fd02afd33adf6080e55b77. 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/FR9W12313094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4292248a8aea6c6c4679b592ae45385c4ad43f60894fdd7115b255087d21210f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W12313107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dc2ac0c2a409c12ef843fea2afeb48054454f6ddafa2b9df72ff027db368d4. 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/FR9W12313090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42b48434952edd5465b12da7153d0b49c04bbd7037d06a347d212ebe682c847. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W12313095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2b2cbadea0f7d14111338469bb4c2496675fb46edd5baf140c38cfa0e9caa0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W12250064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ad6ac98ca489025741e883fd61cac92799ea725c3193344a1b4dbbd94ff1af. 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/FR9W12250066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1766e38b6d5e8ad5c7599c0f4451bf9d2af750bcf5e8b6202c5522d4e30b6621. 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/FR9W12250062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b80e6ece19434455a81e77be5b75a93793ad0cd5dc8e59d1b944de28a68e6a9. 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/FR9W12250061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875fdb9adab50cdc0bad359da9c292973b1ae3fe605efcd67145b6c386997baa. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR9W12250060.