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 0xcfbe0881f730cf6ab7abc6bcfb12490488bc66d3425f6024c4e59d12d90b0a7e. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/590aa03d-10bd-4066-a535-71adbef59ee8.json and https://artists.proofprofile.net/proofs/artist/590aa03d-10bd-4066-a535-71adbef59ee8.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 0x536dcd7af8b9e6b01cacb621e8bc231bce234a570a6d710e25ecb0e6541760da. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFL2581787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df22fccd601116256440ee5c490430a6fb60f599d5612c0c7b041ef0ab1f519. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZWFL2581802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfefb3e9113b94b4471edf972e44e09ca0c897239cc8591f0bf9784c48ef6d2. 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/QZWFL2581783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb727a7ddedf4cd99d670c38acf34adc3c140da895fcc1724670e6bbed4783051. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:18:10Z), 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/QZWFL2581805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34160fe302b6382b664f92cae9a6c08ce075b8eaeea7d02fdca5118788d3ee1. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZWFL2581799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df07ff366cf4c0fcb8643a74ece1c41f300bc50df10f25286e13097cddc18eb. 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/QZWFL2581813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf497302f1cbd966a0c851242b261d44461281fd5428ef9e6d21746ef198a08ac. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/QZWFL2581819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5676000b1ad6ef84eb60494edcd048011d6af9ae558bb28f08f2e1f7532c98. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZWFL2581810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9ec361ba8f607b1027351a955ce5b4412832d268f82f7c88f4b4d0350f98cf. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ7Q2543112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49d56f9ce34e54b634c4b39acf37a60286bd2ca0190247c2cc584cb190026a8. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7Q2545279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984f347fcaa73593c0c3d3e945682f5adaf57b7382a150dd807db137382a8323. 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/QZZ7Q2545444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aab7425e7331163cca426fe1a37334fdda4f670c2aee1cd3f430147f568457f. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7Q2545459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2ce77cf2a40e03098d8a90d53db99ff15714aa0dc611da1c8547b3c6b34d2a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7Q2545645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ce074531f8eb8bad3300133d1801f66901d1375eef096cddc84a46bb9999ed. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7Q2545501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48faf156d5205eaeab42cd103cb34c633591b7f74896955fc8e2c802163df302. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:41:54Z), 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/QZZ7Q2545613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960b1631cd07e49a7bb174e01991b003ca8f6703d58c030d254eec02e4cc9e59. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7Q2545574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3e9e7f02b3f76b696e03761abb204f41f0ebe575f157008805fc8dc5ac5369. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7Q2545529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ede42a4cce60c8eecd57908d0b3d8ba0ed512c5592ad02202dfdb4d60b4254. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ7Q2545512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3604351e78fae6d60da7303654493027dbbd29a23da3e00de6753a16864c38c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7Q2545658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6122bfe0c8c47f73da7a7bc9e0085e2d00bba95097102c807349ce0fc8b657. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ7Q2547976.