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 0x4cda8165d322b47ae50cef4283ddb96d8520a1f3d287497ce715537cefd4b9e2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f5b8ec1-7516-4278-a25c-bbdfdb006c47.json and https://artists.proofprofile.net/proofs/artist/8f5b8ec1-7516-4278-a25c-bbdfdb006c47.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 0xff1936f217e1c5cfe5111bc4bfd9384ca05fa353e40761ceb01621294a5a0c35. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:33:29Z), 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/QZNJW2404329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c1c2c6c8db4b93088ef18966c234f3c76e754d04f433f9d0978ed5dd1e7fdf. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNJW2404397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6876479f1136058d9beff7ea514d95b91058709ed21df2ad1b5d93b8edbcc851. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNJW2404389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865d125db4f0e259a8eb2a3dc2699fd939c15a9df72ad7f32909411f0f63989c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:39:57Z), 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/QZNJX2465042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72de612df0a88003f83ee5bc2f20028252b42b4becde0acb389305a75a00882. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZNJX2465033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f2ded228e9fe7c3670c2916f2b66dba22a8e34d2beecc594741a7986e82e38. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNJX2465061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db5b6bbbb2f10c073a057ac8aaec9b78f42b95a9f434d93fb0c8290ae6cf932. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTVM2488845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244cb33cf3b9bfa2b50bc32c4c3a477f752bc6c0f6d0a2d0ba004ff9da85f6d8. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZW9L2441011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fcc084ae7a04b6385c4d325d73a4018be520f44ebb7a95f70e0fbe18c16244. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:34:35Z), 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/QZW9L2441026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2974d37712a683357e522b51fe6907d2d2cb77fb714eeade7c40c2171db88599. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZW9L2441027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a90628d10c70dfe05ff5c3bc43747243dd0c4abeeab405c5a6702a27fd5a3fb. 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/QZW9L2468659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be2ca4bd8c6d022f799a8e680d9130d1bbe8add9f1eaa4af0b4adf5d81ab9b5. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:27:16Z), 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/QZW9L2468658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd7a9e59b1f115f1ff106cdddedc9ed9bb393290a5f78bb0f37899695e138c9. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZW9L2469078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8e02f94da0cc4982698c1b8d8076f7b26c6278677e3f6fd5662cf3b017778c. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/QZW9L2468690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa161f5dc205e1a5ca8c12005bb24235ce1e1768ef23bc59aff4b1f16fc9a32af. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZW9L2468489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422d36a7600e70ddbb0919b877d68637715fbfbb3f3d2e62916f6aeb6a71f45e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZW9L2486453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db16a08da054d3815498271146526073e4773b8cf141485c922198714c32676. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZGLM2507767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9124333b7ab8d79913c0bb6639572a729f48b72f881057fb24c4cb06458581f5. 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/QZMZ92511436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ec6dd947ff994bef8d4a3fd42fb51db49a1b7a5a61e5a3cf97c999f2d384e0. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZMZ92547909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ffc49bfa75cdfeb82dd0f586be5593ab768f34690c833f2740f6c2b8ab72de. 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/QZMZ92547910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb6c360d2575f7fe141dc209b6cbf7efc746fce445c7cb98dfbdefea4e9d024. 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/QZMZ92547911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12725696ebe6ffeff6651de204c68b834b2d916cffdb80df36d7d649145a8bc3. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZMZ92516835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f99cbea65e228409112d1e4851cea229c8d4c6e1d2370360c4e70dc117aa0b5. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZMZ92516836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae10aa81a912b3c4cf9886d7cba9b715b3d5fea5db243b4d48f6b15ac73c6c9. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:34:26Z), 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/QZMZ92547912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db22bf0f868532d2d66738bd020cf33a9f8c7e77c84553b0704a731a1e3384e. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:06:39Z), 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/QZMZ92547913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeec1d8f2ce2412c318c29a1091cb3a3a1ec1a72fc50926fcbe52487d5270c84. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZMZ92547914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4003a8ae7264138997000003a8df2ba3b6923a02fe344adb209198af3022dcf. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:25:12Z), 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/QZMZ92547915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff491a64775746f2627dc9eabc33ea0a74a7f307ae8ba1840e0d9fe9bc0592d. 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/BR3AV2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a0d71df9db41597df4d00c15038617b0a8275b6166896909a6ae7affec244f. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZMZ92547916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c493e01c983ceea900200450a4363fb7a42754c6cc2b636b700854d82c1d12. 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/QZMZ92547917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0928eef3c0342595ffa12252843196960d646e83eeaee837f90d3e7c6ceba5fc. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZMZ92516844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f9a51e2e5f1395b21ec7f716632d5b767bb4b241ab3e8ab8cf517729af8988. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZMZ92547919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2d62e0a76fa9cd071e15a9293efc439ab6c74c86f01c51d93039de60d92d82. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:00:31Z), 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/QZNJW2551237.