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 0x15c80801936439a47f69dfc72a25f8590bd3de4486fe8fe2c7d7759e9042d025. 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/3e9bba3d-c9c9-41db-9d96-90ae808b2cc7.json and https://artists.proofprofile.net/proofs/artist/3e9bba3d-c9c9-41db-9d96-90ae808b2cc7.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 0xaea60bcb051eccbd04b65df98423b5afcd3e0d8beaf88847cd48eb747eaaa6a8. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBCKG0700769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fa4378c24e10ac7b1db620971ded8bb7528763bd23964fed0bf7ce18da5188. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBCKG0500387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f5adbcf5bb2706e999afd6b80aa216ba53a42670ef86dae437fbad3b9bc49e. 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/GBCKG0500388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19381a6259480f83aaa262169e66d69ff1446f83506b06477ea77d80aad3e525. 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/GBCKG0500389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e0da3610b2dd94037689e68eb3bb73ead7167f7281275f856fab30048986f7. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBCKG0500390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b854054fe3769d2acacf9019d8219372227ba7b6fd52c9cb1cf48181e3c5ec. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBCKG0500391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d822b81378e1eaf8b0422f04a989db0ca70aef219bc5b19635bcb21e4cc193c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBCKG0500424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd256074aec6d0424523b7a524b0a838cd72a5ace0f0bc902d98860eff251ae. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBCKG0500393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec54df2ee9f11acd5de8d3dc5fa45d3c3f345dd9771043ae5fe1a9b4e1bb830. 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/GBCKG1500129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781039fc1df8df21b1f4a9fbefadebb0727f3e66d96cfe7ccafaec85a8aaeccb. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBCKG0500394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1b8290594f865927aabadb57135b62506513ca2b47a7340d5a7a2020e4d451. 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/GBCKG0500395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0e243e7a17e7c5b4f542cdeb318a399bae22fa46fdc2159e4d55bec4290c29. 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/GBCKG0500396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b200f0e1c1368af52ed56695cee8e0a6ed587efb3cf3aad1f074e9d3f0cb2d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBCKG0500397.
Heart of the Dragon Ensemble: Chinese New Year's Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85355f302897ca714d32822631fb0873f1d189786d432a7ac4f27d9d98765f8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCKG0601407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3c2275cb1479d885d63dabe400dc0edb73f7c2f40dc1ad07efd06a9a3a2160. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBCKG0601408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1929ebe99baa3026e846fe74cf86f7d6af4b8d3e9ff933c96a52843779d41cd3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCKG0601409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cbf66505f8cda46afcb8dff93058c4d501b192edd5c7d8ec35e9c870218390. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCKG0601410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d357c8731aafe80600dbb2b1c709021cece57913d617c2f3dc825c15af852a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCKG0601411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe963f78e861359ba34bb7427d7d082255c7aad6951bfda3819febf0e0171bad6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCKG0601412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf716d6f5e31d7c31e0c26582b811f35ad7b3d45503efb5435e8035408f7a7b5a. 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/GBCKG0601413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa201c47dfa2367e181b2a689fdf8e6cbda064134fd424b8952bff838e08402. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCKG0601414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824ed87b54217e3db83996941a66d4ecff8ce5a9505071ac154c174295ea26e0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCKG0601415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa251262b356f0c07cf138f49b5a0d0ca1ee91411e964c30b949274d6bdad2fd3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCKG0601416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3956883a6c1f2322c4fcd9b8f73af4e5865b575238a5fb4f13176edd2bf438. 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/GBCKG0601417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f5278ad20773b590820132349d4f50b7449a001d6869d6c5ad66c3738014e2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBCKG0601418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da7f70ad89a9bf89c72542e8bc2478b94e7c63755be760ca18cb328e10502ca. 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/GBCKG0601419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2628a252ff4d5e56f856d68583873d43596bb2fd0f675cb8f9dfb1a584f4f06. 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/GBCKG0601420.
Heart of the Dragon Ensemble: Classical Folk Music From China
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b200f0e1c1368af52ed56695cee8e0a6ed587efb3cf3aad1f074e9d3f0cb2d. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBCKG0500397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1d75b3aa96e8050054130e7b5493869c2262e1e6550bae7444baf1157a57ea. 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/GBCKG0502188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c24dd05102466bf50b71b3cc9fcef7888fe58d35a479b76ba8f234682e39c1. 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/GBCKG0502189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2406e0e0922312b38ddd8c2dc0d4c1a538c42127020c078ca2469bbbcf8e10. 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/GBCKG0502190.
Go to the West - Meeting in Menggu Tents - Be Together - Sister Liu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cdb0bfd9c1bd7c05fe6d4023bbdb3c82d15ca65036ca5be8180929a75470be. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/GBCKG0502191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2682810828e8672f653c6b30dc0595b582229a9a969fb23c6a11a7e9c93a1d6b. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/GBCKG0502192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862c592a109bdc6db9663f786322c2808b56f038ec976a5fa1a5ec18a4bf23e9. 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/GBCKG0502193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc203ec9cf1846987fe9c509acbb7ae8bb891c722c233a6f7d1d00b9b65ca91. 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/GBCKG0502194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd513d868f7588618d1b425edb7e218cfc8bf9e3117aba68b968bd6a5a77cc33. 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/GBCKG0502195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebab9434b763d80ed1093586a2019c7304da0949857f1044d9071aef28b18a41. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBCKG0502196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4144ed0511531808f07cf0b28094519f6b4fe67867e392667958ad5135bc0a0b. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBCKG0502197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19381a6259480f83aaa262169e66d69ff1446f83506b06477ea77d80aad3e525. 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/GBCKG0500389.