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 0xf714c642becc4bcacc1530019c49a93d5c4cd30382603387120d6ade54782cec. 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/c6e05030-8912-4fe6-8b73-eea3a4f924c8.json and https://artists.proofprofile.net/proofs/artist/c6e05030-8912-4fe6-8b73-eea3a4f924c8.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 0x5b2ff9938a8b8088a7af140e8410b966bd581fd9530fed721901010cdbecd854. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/RUZ231800044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb4744a90de7b485f94ba6b8d30c3c6229f094c4514dfb363c0824845efc370. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:04:03Z), 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/RUA591800397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fd1673a39f59415c4e36ffa3dbdbae7880aa7c390d5e0602550dc4ac94e301. 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/RUA591800400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc699c36f852005a0cbe17901c381767be70ba68fb601a04d43083d2b95c895ff. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/RUA591800409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce9c9a5a57941a699ff17c96f985384642d75fb8f62d4297f02d8e341aaa92c. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/RUA591800412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d9d3d5cb5c5b9baf4f05d79114c3486f79da7deab156ede75072a94b275717. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:25:52Z), 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/RUA591800440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29e00e50351cf70f6b5cf4dd00ab4f6099f7778fc484de596e3a1ae83b33eff. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:44:43Z), 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/TCAFO2191834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87aa47d1d16f6652eb8b22ea3e4a32e88ea29eee5cafcd44ed7ca6c8140f3c8. 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/TCAFS2164762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad32b87fa0dc6da7760c55c90b094fd7e23144adaf7f4c734b9595263d1a01d2. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAFU2185674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afbc9f75f12302753ba1aebd0b717583e586d5e5cdc13d8e3dc862cd3607876. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:03:20Z), 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/TCAGM2211990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871424cf3d36348ee8ffa355d276be9b37a3e7e2e8756454b6f474ed9efc94f8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:48:37Z), 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/TCAGN2210816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad92281b772de86d5264695c874fa911a5f1510f30cd5d87f0c80fe8c859b92d. 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/FRX452403677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208e27a0e13c72b85632ea5fee5fd2277480f346a87e72e7ea6d432e6dbe68be. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DGA0R2456666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec681665a68b8617593e753534853466c099edec3cb7a76c4115a65657fce214. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:59:52Z), 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/DGA0S2445075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120917df65ca068f11420b71b994e48b3150570542ebf74cf6234e8aeb21e0a4. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/FR96X2507832.