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 0x5ffd798f2c0ee0a0c043e0f2b7e6f756c738a2b5cacbf4d422e31361205704cb. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf5383ec-aacb-4fd5-bd6d-72823e89a7c9.json and https://artists.proofprofile.net/proofs/artist/bf5383ec-aacb-4fd5-bd6d-72823e89a7c9.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 0x48486a69f25f50b6018b3e85be2e9d77c53442f4187b0254874cb93f72a529db. 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/QZHN82026503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e09968eb371d2fb9be50788ca79e59af9cc99c30ec8ed39af9c7ee0a5278332. 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/QZHN82026504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1683d1e8652a46e64f1596b0460ede927e13b477455bf4b5a23c3f539bc19a. 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/QZHN82026505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bf122698641ac2758194e3a9872af6962991a123640a5192fe0aa68df28f6f. 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/QZDA42018906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad422b877ff3770af8c6ae4d0bca80f3d8e11b6bce46ba80fb9bf7b15c26d6d. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:25:20Z), 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/QZHN82026506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c1614daa0dc7f671f94f5a5c8d940b920bd490a306491aa1886a3413296cd6. 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/QZFZ22435142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570fd84bd3e988b29dc63d4192dd5b31a03b3aeb5fbeea44faaaa7c10da396e3. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:36:01Z), 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/QZTB82238722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6dacc5267f84d58264c15c09dd79aef88a8908d0d0f7d4b9633e2349c172cf. 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/QZFZ22435143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99079e1ac276ad8c34132225d9c05c048dd99afb7dca4668a2a8180e7afe7415. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:27:15Z), 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/QZFZ22435144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd623ddcfd1ffbf230e5086c838c6001e8b722f8af070f0a27786e50e63f2ef4e. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:51:48Z), 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/QZFZ22435145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73701d64e61ea8de48980fe6ed35f90af4882585b9a7c6c402961a0a7e06a659. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:35:01Z), 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/QZPLR2363597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d0cc2f388eb57ba3bb1a935db5a993041eff033b4381b86766f54e5dc29342. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFZ22435146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84753bbb635cc5c7d160cc7ab69d26f058e78a01759e886a1a9adc600f462e8d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWV2575871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574d85ae2d8a3282c95e7243b94a2be4d3c9d8899958ec40267e815f7d744773. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:21:17Z), 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/QZNWV2575872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a2e1cccc0cc8f2f8b805db6b867e035b08765e3ba4e5532fe2a0102df03b47. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZNWV2575873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282951c6cca7154928d8f92661e987f1853b550510035db056aa8cb44d3730ac. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:05:17Z), 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/QZNWV2575874.