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 0x1d41855cfeff3e06f0a85633e3c9c2ed2aa870629b5b328c2a71f3c3284cf150. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87e85359-2193-4a81-9f3e-69ed07525b35.json and https://artists.proofprofile.net/proofs/artist/87e85359-2193-4a81-9f3e-69ed07525b35.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 0xf66743a218e35349c8a5afa6a2491c60c4d82772c17485fbb858ffc5b1a83dbc. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BXIV82415266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa744a5ded410825c3f656c1760254ec9adc8adfeaffea7023ef3f7ce23c35a8a. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/BXIV82447742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddf914f70f171d09c9eb005683f1cc8bead3c0d0f29273773d90c4c830ee552. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZNJX2334160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191ca2bb176b99ad807b2001384ae32c80e5a1a694870ae35292bb450536807a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZS642352952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aed3bc311758c13708d0529c4ec910bdfd0e1ed3fb3b31a2f4fa7436e4a0f15. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QM42K2368629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c737ed7bbae029d575f8ec4f9471179cece3cfdaf8f6d9d8a08242313e6da3b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZW9M2405191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c845d6f736c24cb0eb953e50711b2c40801a8982826487cc43a76fef5e2fd51. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZW9M2405192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa97a971f7b3e8f3a90fa122d7d44c96d58feca08e8f710dd0a65986f2f9402. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZW9M2405193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c136c0f38901466769573048edca5dccb8984f5f4dc39455c94a7f29d359786. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZW9M2405195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60afd0dfd9f9d82da98ce73cf7fe8211f600695e10b9c0671815e3db680ffb71. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZW9M2405194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b14e5ff4bc7ab8c721c534cecf558b6ac410848d901f988000109925f7678c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZW9M2405196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c2cbb26777ab5e932d4c50e143b1cf51365789bc348cb9c80c47204aec6073. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXIV82450828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fb2841955fa75a0e61b929bf119b19593b9ec9fa1e3027d7be87e4a7f7bb3c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXIV82462857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb3c0273cc777c583265a76adcd19ef879d9af2303fd823ad6131e1d30b3d8e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BXIV82479180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7004e72000de0f4f5bd93bac46300adf7a614a2bb5055bc279d08b8cef0183e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM42K2290837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e68a59aa36a7061ed4cab1bb6104cde7b31f62ed3475996f686016a650fe5a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZMHP2344736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbdb0f441a8099d6b8d4741778bbc3cfbbfdc03e71bffc122a79686c303a2a9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM42K2361542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281fa0e3c720ba0c143958c4bced50628dc3beb0387f7df9763c9a94f194b139. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZMHL2386033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb4666ea14efdeeddeed66ece6935b55d8a82c6b97bba2a3fb6e79c0bcf2046. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZS642340305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d3efc5ae947b6cbc93910586956ea0d780bdbd4cce443361c01fa6fd95d219. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMHL2303077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca4e164f85d5414a1e9f542d616ce31219f2c2e5f81ab0e8bd6d75701ff8e6d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMHL2320911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc386717d78b7fe9ff6a8c05114947e6af58e23dd8a7eacb1a896db07f16531d9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMHP2394453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dc7a181e46e67d013f5d842a3ecf709b84ed2214714c77ccd80909b967941a. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZS632342071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe748edd3f7a5a0d31d1ccb325d57e074e57d12740c96ae2e6a2194f2a13631b2. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZS632391164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bcc3cdbf29b443b547c1afb570862bff8f25d738284481c168b154db87cfac. 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/QZMHL2245747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8a6b12a3aa8fa8d9154c25e710df31fc6ddf5617618614488477ecb5a4cc5a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMHM2281950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717afb33355dd940f7b6705c5df04adcac2d2a3b4de13e96bc77d9e8d2846be3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS672282791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055051053a8a6a9fdbf1843affe06ead6448523e4a97243836c3692f8ac54fd9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZS632266045.