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 0x9355cc0a0357e38b2159fdd6d533799a0fa721e895a3dd6eadd45797e784cd9d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47625caa-73e3-4112-8db6-db6dee8f0247.json and https://artists.proofprofile.net/proofs/artist/47625caa-73e3-4112-8db6-db6dee8f0247.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 0x5fad637d8f07c0e86bb44ad72c1e3beccd4810b2163e20cd9cad57be2f856133. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/TCACK1588635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41afa518ec8ab01f5d01f1c28f6fc3758f75cde08be7c984138ec940c5d4cf0. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:11:15Z), 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/TCACK1588636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da516e36feeb18d3ee0f3bd46bf3b85c05b7b627c6ace17aa681d7f46246d7d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCACK1588640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d3d7d14449143e116db7f950c3e66edb66caa9c07f47f3682529af1b42fc9e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:33:26Z), 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/TCACL1653637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3058842fdde5ae42df9f447802d653e0f6ec84c68e62f736666ac852cfc76570. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:33:06Z), 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/TCACW1736816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694ef45c81ed4ea160aa65f421f899e7fdb42e1cc55cf7fa8f4589c8a6ceef61. 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/TCADC1704294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430cb3804cd12825457045be5ebfa20deaf22adec573d6ae0e1d734a793993c4. 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/TCADC1704297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffa4661312ac77aa56c969fdbad1c937b503e05b736e90490aa271da9ac7827. 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/TCADC1704303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40584d7e62b7664731d414e83ad3bebc700726e29c4e944523b96d19a54cf986. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCADC1704304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f949374177840f8ef8b8eb183a98822d71a2a4ab6c72c7b45aa6d70ea0aba4. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/TCADC1704305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39e0da8d8f0282645bcad244fa2a4e8c5a419ab3909f69326cfd02b1bf72af5. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/TCADW1889809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5d4e1df052da103a11f39cef3c65c4efab661c23e41932bdc8ddc5122bbf0f. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:18:23Z), 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/TCADW1889993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44e716873cd46ba79ebff193835c1eb228034dc2c40c203d6eb23a6c4a53ca2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCADZ1800539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe444561a58896b7bbf1d3c3aeb781b51c379b5f340bf33ba8de4340711be41a0. 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/TCAEO1953849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ead03c1f14f09576dc7cc80141b770856b91ee05d2129a27516d74cc4d0ace6. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/TCAEO1953855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b15b2abda2d6ea1ea654374a6c79ddc9d55d72b7140fd989771b3eb345eb09. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAEO1953856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3129334e58bc7f81dd0820c923a55f995057ce630fe7ca9c4c3a0fcdc56d0a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAEO1953858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21aa2715cdcacfb3cb6ab93718ab64c44799434d71cffed72e2777547f9e74a8. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:29:59Z), 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/TCAEO1953867.