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 0xfac4a86656731c2f1effee338fa10143f7fe3927f190d809f5c8ffe0361df8b9. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b48559e-b78b-4f48-a709-01497335cade.json and https://artists.proofprofile.net/proofs/artist/0b48559e-b78b-4f48-a709-01497335cade.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Eriks Esenvalds Passion and Resurrection/Rihards Dubra Te Deum
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 0x7840d776d5e574bd37cbbccbb59308e507e6d8a40d342d3b8195bae041d2643f. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/LV06A3300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3f5fd4d48cbbb1efb8d5582597ff382bfd27a3a29aaf622202edaf2f9f9c88. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/LV06A3300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0ec4872b3ee6b8d7cc1a297b74be4b0d799d57c851908618addcb6861bcdb1. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBKPL1251737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7467ded62c6695c393b40ffefbd915d49d086ed8adb4831de0c26f5b7f08299. 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/GBKPL1251741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9402a48ad5b445db1553307efb740be90e21a8ce20a4cac48b1e29fcd7533db0. 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/GBKPL2032178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7204fc76e91c8742eebd14b05701323e5b27f52e88e4edff4ad16bfa43e62721. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBKPL2032181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d390578071d9ccaf50f6eae0506ba9ac37f2a979a04a4e2a4113aae3b75339. 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/GBKPL2032183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779a4d1ed941e55c404fdc839e772c3ad820811f4b32bdc8df592fa9b7b62753. 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/GBKPL2032186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad47d9e66f8f665e4de836c8f0a44b7e7cb3aba0a37b891cb3b9761f81699c4c. 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/GBKPL2032191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae287f98a959155acc099d3c9a61978d5215457fc1c1ac5973849883c117e4b. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/GBKPL2032192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb05fe277cdd8437dadcb138cb1ad5a7aace4d10a134133f9de960dfcb4a80fe. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBKPL2032193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3ccbd6413b6df8a39f3abf1a08b7d77b91ab8f764349d09c0760d46580cbd8. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBKPL1251740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac69a388ea02928e0081fc8ba21cea577a988fcc9def9dd819d175345bf4f57. 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/LVC251408459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeeda3c54bb904b4e14ad0efae7d76882d5c09f2b18d90f967b77aa243c8190b. 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/LVC251408429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac58175b62324a77bff7c80c8fadd7ab4a6d1ba0373f4b60b93eed6fc46f1534. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/LVL151706963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d26b35e97fafd245896dad8023e1bea59a4ba264172f45cdc2f4722cbf1e63a. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/LVL151706964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcfdb582e647c9799eebc4edbea63610a0108c893a716f7e8b56e990a331339. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/LVC671200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5553e843cd48fcde3e872b0143bc221b0f3cf4321569115c3f644d2ce5308ab5. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/LVC251402553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427a5a874032da70a5a4e2278ae46bc9034e88e55af7a8c51523d06b4f6578af. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/LVC251402554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e97c430cf057ce3cd419f3d706c383accc37e973658947bcd86d5608cda7e5. 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/QMFME2314471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d3b520eec4ac44cb32168f2f274bae1fe5ed62559aaa37b104a8d443e0fb3a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QMFME2314472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4eec1ff29cc8febea23f648cf38310059394f27c837304347f3211cd09f0fa. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMFME2314473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a3e6a1580aaaceca8acc6fc100ebaf823ddbc60108539e0a5ca1aa8d6b7a87. 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/QMFME2314474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cba363b82d67dec670f09dc64469a376e651a70a23425e28aedd1a95a4df28e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME2314475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50abaa4968436faa61775f2809ffbf789998cf05190870d0fe4b900fa4b96cf6. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QMFME2314476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b19688255d9e6297292a6f65b128d6788aa981dd049dfcb71c34d0398820fff. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/LVC761400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3e5f10879443b864c251a2341b85df80df80cf8c0b27ca23d6727150a78a19. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/LVC761400263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35ea00d382e8e2ca9c4717c61cfc8d1df6918db27c12d9651ff458bd0b8f595. 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/USDY42335229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd964b9d69fe167e60a226a85242ff6cfbbd87723dced385c41e61d6aa46384. 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/USDY42335231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b29681a01a63b2451c3dc2786c4b48803de32e48013c88aa1a0db700bf3184. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMBZ92473341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1476b3263890223cfb0100efa61005216477fc90930d04de82aa6c23721417a8. 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/QMBZ92473339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212ebfe5c5f82e1f51aa0d20c17e770428c824aa26804ca1a7f9ef20a1b06eda. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/QMBZ92473336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb678a7d24e93e04b0e2b03ad455f29d9985feb1aef79746ada914e5ea24ed0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMBZ92473337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9296ef8f083d4448bd1f2ba0a3262c07d2a05416addf65b52fcb9ede325ccc. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QMBZ92473338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1476b3263890223cfb0100efa61005216477fc90930d04de82aa6c23721417a8. 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/QMBZ92473339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3d3809b0531ea80307cd281a8322a95599ceaba40ac3ca12de9a724787db27. 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/QMBZ92473340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9296ef8f083d4448bd1f2ba0a3262c07d2a05416addf65b52fcb9ede325ccc. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QMBZ92473338.