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 0x5cc6bece1be8524fb179cba3689465041a7eb5efe5dbc596180d764674001169. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f31d38d-9adb-45dc-be8d-ec2baf62d0d3.json and https://artists.proofprofile.net/proofs/artist/8f31d38d-9adb-45dc-be8d-ec2baf62d0d3.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 0x730692df6864adb9a65f83a7cc51b176515c03c1ca5b49a50dc9e00a540d0b54. 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/USTC90919117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb59b634e055541242c7182b960e4905106a0a1f17b59958c956c0d7ee5c0a4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USTC90919129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f43b4c37271c2075f0f1f1ec14c3a4d5276c9615f76551bd70b335b3bf47219. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:21:14Z), 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/USTC90919137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f27e84e7b8d0fe9def687102d0fb2f92a9a66a3d1b2469db9f7cf4033ee7eb. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/USTC90919133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec3399fc09c5978ccd0cb59ef53610c0ecc5802aebf9f17204a0a5d559189b2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USTC90919134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134336679366a1c9e8fb5054260b898506b2a394351e1a5801ea116023fa49aa. 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/USTC90919135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e0f124d5e1394cb34b0e5e65f96baae34eaedd38ab26d9f5ece071b960cd8a. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:32:13Z), 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/USTC90919143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa552b51c850db7a9cbaaf75d549739d3f3ef23aeea65b4964b6db153db41b92e. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USTC90919146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d92a24a2fc02adf9e4083aca3c0541c70a3a216d4b9681e68a8ddd06cf5f701. 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/USTC90919148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7903ef09c8393f69f7cb2d5766bc55acc1637c80df61cb4222c64b96670994. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USTC90919149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182d11a66f6c6187e6de50161b81b8320ce9eac67ee271a019663155498346ce. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USTC90919150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a9e7264538747cf2f0fc172a963aea011a0dce71aa0de85aed3737a6d2c337. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USTC90919151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39efcc4989d5a3b37242e8e8d7aef5ae25101631ff5a85749929dd7b0acd4cff. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/USTC90919152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac1dc4a5869516f950ee22431a417471d0b941bff3d9036de621c46fe3ca992. 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/US43C1000082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3233e425173655c72f574090a4247adf702bb79f97002f4845d23224930a82cc. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:58:06Z), 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/US43C1000086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985047ad50880264063b9c83775bf7add2055666ef1158bbf2886ea1646a9fa2. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:05:28Z), 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/US43C1000087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee164183919f2f17f4ed24f306bbbdf84de2d3a5eeac5602d04bcca65ec935e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:08:23Z), 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/US43C1000088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d3bad45e23f2c68076e10ce301528e3e800a6b044109d753c9859df79f5b23. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/US43C1000089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75849b8f3f67b1966ed54b0e84700eff5ad491a5a923990a1e477e32ec0e0e8e. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/US43C1000090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165ad9241471280404f6cc3a6af72e580a541cde2e17d07f7cd409d17f934edd. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:34:48Z), 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/US43C1000092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9665eca5da488de61f891cb332edec6567da0b5d36fbd864f21a1e841af92c35. 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/US43C1000095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79354d15abca2fe2c3ae1133521046efce731142e97a8bb9e7b559353021f838. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/US43C1400721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441d565d4bd2fc03be786692eac8baf2ffb8d0df05c389fde7a69fc2a4f6acb8. 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/US43C1400727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff4374dabb6a5403c534be41cb6adaae6ed3ece4a7da0d957e97d2311880cee. 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/QZD7E1800251.