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 0x1863ec8b636579af4a3afddacecadafd1696e7e0e4c8545e921028fe7e6dc1c4. 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/0a2e6c68-f4c6-4381-b100-0152b1f7c4d3.json and https://artists.proofprofile.net/proofs/artist/0a2e6c68-f4c6-4381-b100-0152b1f7c4d3.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 0x6df38b1b34c910e2a6cbd8cdf6287476dc3930264c2eb194bde6f60114e07bab. 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/FR96X2132947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1276c1781ef5f325109fdbf795343c79c5ef3aa878eef3134041b01d014f518. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/FRX202173255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164851efca4a0a27cc8ab44de62f610a9bf5f47fe96634c4413766eaaeffc490. 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/FR96X2151529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db24ed83b7d5f110862fec388932b720e86198acae339c6c93d7e235e1e7713. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/FRX762192582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059387eef78596ddaf195ee640173ea56bc958746929f688a9790e3db58092aa. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FRX202216720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb099b8827eeeefef7f576cac189c1bca48a39d54a7f408bfd6a96bf39032a3b7. 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/FRX282201804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb099b8827eeeefef7f576cac189c1bca48a39d54a7f408bfd6a96bf39032a3b7. 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/FRX282201804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57903d313ad283d0eb798e9f3c821f11462d00864f40c90d5f3da8c0cafbba58. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/FRX282254512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6bee31932ed1f409dfa4a7a29d12c5ce472e1d85cbe41ea46362616871036a. 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/FRX282254513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1af48c65e1389b70fce3795a7e46f7c0a4401e8a664a4c7fadde1881cf02587. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FRX282254515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23282d7e8720bf7248844745e567e0a97dbd0ce5df1db3c41aa69324bd527e46. 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/FRX452286198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e10552de9a2b585b8dae2655d420786b85429a1e003b00285bdbc10b9a99b00. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/FRX452286199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39f7148b182cbe1e9b7e69e845f698ab23a328178946246d428dee958acbd1b. 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/FRX452286201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cc9a847f5e3e2f1239af91d29c0504f05cb49878656539615d7cacb6018921. 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/FRX452286203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025895bcc1f3c2d47d0e8f29b391f3d071eea4b89908219897366ad816096b0f. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/FRX452286205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc941ce1547138d2c90c96f28756ccf266d7d4f9ed93c6cf99009e95286377ede. 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/FRX872272893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cee22cdeb93263109225f140676fe2185a43400e30e003bc53c38fcd524505. 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/FRX872272894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555a22f4caff2b0a1cc771d4510da0d2b1e449d619a6d72f203283ba2fe9254b. 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/FRX872272896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44dd0bd87bb1c55fb6858d286d6ff993288c1e8c70f3963f086c3e1fe7e3a3c. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FR59R2384712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4804a385dc138d63af636eb3a0a0a133096e11d17ecedcd9d1a8e7f126b41aab. 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/FRX452328591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8972a37caf82fafeb5de601a9289fa8b882fc09eb0053f17f45dc0b2d1fd74. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/FRX452360751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04417ee241d29c16173f5d76c3c3f9a36d516eab3c04c3e833b8a5d4c0aa911c. 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/FRX202389443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44dd0bd87bb1c55fb6858d286d6ff993288c1e8c70f3963f086c3e1fe7e3a3c. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR59R2384712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4804a385dc138d63af636eb3a0a0a133096e11d17ecedcd9d1a8e7f126b41aab. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FRX452328591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0390dc9c8668c440c6db4a7a8223caae727ab17cc409437e9d2a179fae6e8b11. 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/FRX452360747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fb12945b67605ad5a78a7a2ce97418836dcf228a6dc5f996200f499a358115. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/FRX452360750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd8d943cb6c3e1086a8cd7d40b7be36975f2d57fb1cf1721494b00c7ff5ff6a. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/DGA062309423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a475721d35a39c784a0342d8251cc8db86052f1b668a5d5e44dcedbdb2b347. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DGA082398454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c5b0f1f5a53f237a6103a576156fd4f38ff18c43dbef4d6f64911bd3d3cb1e. 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/DGA0H2302491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b67ffe9a7992ddd948cb6b25bb7cb8f2e5ce4d975919b22fea837e57edbecd1. 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/DGA0L2377089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c6d865bca2ba884298c46a6ba42f804a5c67ebc8160d659e9713ef5fea4b2b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DGA0L2377090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe55961a87cd8dfd2296453d806d0edfa17f3c9df287ae0a607104915c71d3e5. 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/QM6P42402550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3d9e679535bab3b81dc81c5e365c1f7667fc3f9a26612b2185cd9cd1779883. 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/DGA0R2483373.