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 0x71624077ebf9c0c99f6a050bb9c5b927cd1c0fab6992cc965ddabb33400f6c76. 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/34b17079-f47b-46a9-b174-8e409417c78b.json and https://artists.proofprofile.net/proofs/artist/34b17079-f47b-46a9-b174-8e409417c78b.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 0x282796aa2da9db275ce8a5f6fbec28c7b812aee69cf88ab73e31ef5527d2ab18. 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/QSDY41741381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d615e1537b46eeb6907b8ebc54a5d6c17d4ef118ae440f417d53eab2706e2bb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:11:14Z), 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/QSDY41741385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91979a6675b2277e9ffbdd391dd2287d69698beacb3779e2a32fb2cdd6cb5546. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:06:00Z), 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/USDY41741411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5c3d007f5ff9f41260a87e0c0caa58b90ed8e379da3ba278fc5bb00001a3a6. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/USDY41741410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca8fce8c13c78d3552a16c92f650141f5954f8268707a041aa67085a8f45640. 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/USDY41741355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e1111f9f6f672c6108e0f56cbcb044c477695170e1e2c70966ab1a9366f814. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USDY41741358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f505eecdba8dda663f2b5dbdf1c20125246e82e1a003abc1453d94fc1919e49. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USDY41741361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc13ade2fdcec02dbbcfa05a70bedd78b830e0dbf101022f2308ebb8a7ee6444. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM6MZ1867882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da681b3fbeda2cb4983be038e3f4022dd16123286c98ed932868b6a30b418ae. 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/QM6MZ1867883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3259dde4bd97629ea361efb6f963ae04595640c06745fe9ff489b2eac8eb8843. 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/QM6MZ1867885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fcb17780fc91a808d257f6f567a7c7efac1985136302134b1e72d838c3047a. 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/QM6MZ1867889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ac7e8cd647170a0c4b1cff24b6db24d98a2ba3604b18e9d5e8eee35c55d73d. 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/ARZ872000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3989446ada9e78f1e3f22b33ff96cb9bb6fb25e85b9d40216046ced388eb0ffd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ARZ872000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef08c0a1bdc6a649579f1902368bc3fcc9c805b7973fc4521be5071b6c2bc96. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARZ872000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc412c26a0c54c5b65b8dbb5110cc8fbb60dd3447fabf9d436cc09b908646a9b7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ARZ872000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59297b0745a844d6fcf8bad2c631666c760900989cc402af8b5e85651da9c590. 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/ARZ872000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159d42cb98ffc03330164bb5c9a2a81db75811d37b23f86792594ae57cf8dbf1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ARZ872000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3edd9064a7e0d4d4aab394377bf647c6eb16a420fceaa6db7d77f971f8daa49. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ARZ872000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc351bd2f006de1c44794c21031879703e122d24463ce7ca1b958942c63a52c56. 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/ARZ872000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ac7e8cd647170a0c4b1cff24b6db24d98a2ba3604b18e9d5e8eee35c55d73d. 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/ARZ872000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3613f3521c2d38c4a12092914d2706661d6bf82d7e533dd8b0142c055635f8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ARZ872100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3989446ada9e78f1e3f22b33ff96cb9bb6fb25e85b9d40216046ced388eb0ffd. 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/ARZ872000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef08c0a1bdc6a649579f1902368bc3fcc9c805b7973fc4521be5071b6c2bc96. 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/ARZ872000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59297b0745a844d6fcf8bad2c631666c760900989cc402af8b5e85651da9c590. 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/ARZ872000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc351bd2f006de1c44794c21031879703e122d24463ce7ca1b958942c63a52c56. 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/ARZ872000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ac7e8cd647170a0c4b1cff24b6db24d98a2ba3604b18e9d5e8eee35c55d73d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARZ872000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3613f3521c2d38c4a12092914d2706661d6bf82d7e533dd8b0142c055635f8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ARZ872100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd18ae52d05612542ca1d10bad467be4d43afa17103638d0b3429e28ca26a3e1. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/USANG2426448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f1ded69e9beeac3db0c63c45800d22b92bf2427d2339124f488a5f14174805. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USANG2426449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc851a271d51e759f1949652ad2339b59ead759c828e911ed5c3d0c63cb2824. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USANG2426458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f60543e78edf701402cb64b3e71f5f4cd717d1670481caf132f49b771788436. 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/USANG2505054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bb557dd836d13a7ec0b0f681fa7ccd00202a1d32e51d3417460bdaf5347760. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:51:23Z), 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/USANG2535097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1a5bd1830e1a836796290202c5266002243b1231de21b8ebcb5a643bc9fc62. 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/ARC082100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220982e3d89041c3e20dc28c81f1c41d1fdb4f3414bb385440a83f00ae3753e8. 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/QM6N21925074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8dd05d99051749ab509f4d9f3d75742757d369d83cb449ee19410fcb1223a8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US7VG1828612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70ed77f29eb508be36554f984d5aeaa2f795f5151e120154288efbf109a9f72. 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/ARB621700013.