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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650ae3422da45edbe78456e85eb80dd145a737b2f8d20b0c63a986248a8a5257. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2cea78d8-a06f-481b-879d-7480d7629c27.json and https://artists.proofprofile.net/proofs/artist/2cea78d8-a06f-481b-879d-7480d7629c27.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10963c40ab841a371a3e46eecf2769ecec70cf00b41258b909dc6d93a8c25110. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/FRX202344796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9140aff1a8fccce97db15ddbc13c13ebc8ab6bd0ca9a254b250b5d0880f62c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/SE6QE2308509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda2d5264b66bc44d37315a5c1d6d4847c30d90fc7e7e6ff82beeb6f03dd757e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/SE6SA2355381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9238ed999981d78c261be65bde01cb9a1cc74a4e2ce18c5722d52d8d372376. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE6A92353066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0381001fce29681e75c025ffd0fc5a6377cc0d3396c0dbd94e022e96b2616f4. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/SE5752478402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99f1b963f4fc591319dbab2e072ed54e3fb66798e8f32c9bbf5981d3dce3043. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/UABM12200647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9238ed999981d78c261be65bde01cb9a1cc74a4e2ce18c5722d52d8d372376. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE6A92353066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d73a3a49075776980a969c2ea3521ed97549d4fedf1010aacfe6f7acfb1bf76. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SE6XX2362740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10963c40ab841a371a3e46eecf2769ecec70cf00b41258b909dc6d93a8c25110. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/FRX202344796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a116449088a116c26fb51eea389e50daf1531624946cb303ed70040fcbd3e3c. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/US7VG2146891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04730e0cce9382cf5e380799843ee8cb548d7299c7cbdc3e20e731697ccff60. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/SE6SA2428428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb6fb91dcec96128616096eff247b2922dd3cac8b86b6e7703dc57da97baaa8. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/SE6SA2460542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f2e7ff245d57878d4cf127202d6edadbf5dda03f7414e59ea7f0d71845b42c. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/SE5BU2542603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4a37694ca98bcd8e6703d8f27e8a995a92308531bacd9a51cfe3f5eaa6fcac. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SE6XY2589151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d5c9b140c152178e187ad414a107c344e4fe2dcdb86aa09403a6495625ccf0. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SE6XX2592676.