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 0x4578ef7baaf3b45bee599b422881c319020e46e8761447e816b673beebcc20aa. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7bb9e513-e46a-4805-ace5-ae3abc559d47.json and https://artists.proofprofile.net/proofs/artist/7bb9e513-e46a-4805-ace5-ae3abc559d47.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 0x5662a75177c8a46ed6d77b0299da93228efcf476986754577baa668831f9cfa8. 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/QZDA52334866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c78d0c42271201792ebeaaa5a4320d14fec4a4c1bfab63cf12b188b2c6747a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USANG2423396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef87e59d2f3da67e17ae60bd70bcff0d063d09dd224b4f2ca063e94441308be. 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/USANG2423395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ac38b3bd29caf521bc0a8e4f918f30934ce02c2ac62e747f55c4f1ca6a3707. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USANG2423397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859de5355dbef6f61bc492a137e213e1e0a8d9f948c830cadea1f18d8160fe88. 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/QMDA62441552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289eb208408d203881464c77aabd6dfdc844004d0e0156c7f63c0bc4e6e09a56. 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/USANG2475281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ded146bc36cdedaba11071c33659c1e21e8ec31e0e318c28655b39a16a2c60. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USANG2482510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fda41e5d7c9496958cff43b0a1281f7b08cb898fbf3172201c9e62c9e8d5685. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/USANG2482511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47545628881997d62a5561c2e83dbe770e58d275b5247702fdac6aef44bcb397. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QM3DF2420036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe276ad147a97cd5a06c6ee59e54b315655b54f64223cc4799d90071145b13060. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:28:40Z), 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/CA5KR2509952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587c496c714393b56c5fa2f049ebcb6af24cf1e08f78ff5363c23586c1475d8e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CA5KR2509954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951668729000044695437f37af2c361589ea544c426869f459214d7a4602678c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:20:42Z), 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/CA5KR2510919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b74e4c9702a7128e24a90cf92a44c8fd1b5740977c0669407cde41c757748b1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CA5KR2510920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782a223642b692af9deb14415b1bdfdd79a01e9545da58fa67a6e7aa37f13ad6. 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/CA5KR2527079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ae2ebd83f766d9819d973024af5095c42f3280e93a2f51eaff17ec80375d2c. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T13:01:33Z), 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/QMFME2521939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b85a8e57527965cc45eba95393ae397f694ef08710f92004d7d7fef45736517. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:02:33Z), 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/QMFME2521940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089e5d121c597322a2a36bc9d5c96a4eeb99b7fd6156994b1e58c17f4c2a38e8. 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/QMFME2521941.