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 0xcf5cab74b5cbe7717cdbbdcbb7107bb4b45da8f878ca124aa8f2db8c1ee8412a. 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/9d74f961-a227-4587-9aba-0ebbfa7eecb2.json and https://artists.proofprofile.net/proofs/artist/9d74f961-a227-4587-9aba-0ebbfa7eecb2.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 0x1674f3bacc9cd1eb90218b61a8c6544b08f3a7dcdb94b66a90cca22dba025d02. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFYZ2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e64125dd1a776d82d7a9f02010bb9bfe40980438ca2895b36807754e8672c47. 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/QZFYZ2453366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f377348a599a3db730a83b8d257ba5b520714c360e7655405194f88757cada0. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:30:48Z), 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/QZFYZ2453367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda2ecfeef6b895226cf4c4f7df53fbb0d39610cbae6a55acc8e72053696f1ac. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/QZFYZ2453368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c70ef9232f13a2fd52d9d6b1a6869c77c39549ca3791a11577d26f272a977a. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:11:40Z), 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/QZFYZ2493342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d26927734d07c0e20d2d50c58110995ffcf4f5fb7e128af158c1226fb00708. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:22:11Z), 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/QZFZ32403968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311cd149b637b04321cce3f34522f70d3f83444713683e9de6057623ad3d77af. 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/QZFZ32403969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e1b28d0f65a8a11e42e2d668105b239c42e3f69de4637938b4bff97ee86920. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:06:46Z), 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/QZFZ62401539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051be4dcd325316aa4c6715f5738660a0319b932e40d2b40e6257434103ee779. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:24:52Z), 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/QZFZ62401534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7475a2573c1fc4b775354337933fe46f79b4acdb18868966cab96a4a8128724. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZES72430712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c11277f9690d9385f7066fa79a6c67e1e151407ad61681582fbe3c9d7657c2. 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/QZHNA2465795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b9fe45e11f91ee8f120784e81f1ba9339c87c64315c057e0c75ef3df52858a. 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/QZHNB2496489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b17c39488831eee6cdc839ae74b82fc0af454ffaa55a0e523ddd4eb817d80b. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZK6J2466092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cf5a8d831b835185e928a97201abb91a3cf636a20caa704d137e6ae7b5c24a. 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/QZK6H2452617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fdf0a321b2c7b08dcb829278ce2fe03522d8a7ed4c4ce53f1ffdf2236b4cd6. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/QZK6H2461519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f78273b74f998a5ff18075da35f1a70e20c501cffb71b4e152634cd6619de14. 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/QZMEP2401251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206e8cb9aea8456ec9d7cc59963714c81315897754b3b13b104fe2e5336a19aa. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMEP2401059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf6473b3d539ed87e0fb0d048d7072867ffd3b59be6f27a3dc0a6d877b180c2. 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/QZMEP2402117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf59e5a22feaef5cd90a60ee141f683ac542c6f177a2851c3711cc1706fe94d3. 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/QZNWQ2485775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fe2feb58fe87a0f7243a8665445347516c4165935545a32e3358178e8c23f1. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:20:42Z), 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/QZNWV2467298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6ff447823a37b5d46a76af27799e9cfe3bff6b816580476550c3410946569b. 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/QZRP42472217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967936fc2a745d75ed501385c5c7132d4899b81b795ae4cd85b6e3cadd3969a2. 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/QZWFJ2437973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e00b6c05903fb0f942d3e5cadc07d0217955ad61889217a76e20f7fe7574efb. 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/QZZ782465065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c64776b08207c4f5b9ad749fe9434f6ee1052d1e5f17aa9c0f2d479d62f412. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:48:28Z), 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/QZFZ32539013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8575047bbd2bc9e67fe4b747683c5ade7803e59be292fe8f8c9b1fa6809f4106. 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/QZFZ42505831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa191f6141fe470c0104fe35fa47a4da24770b86f3027774660445972d46c3171. 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/QZFZ42507193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb66e6c3a9068373d21b57b45cc9358d01b7058c29d7e6feaf2d946bcb68bc2b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ42507192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9331fbfca10c1856df2054094f5901ec4fb5f88d00775ca107d1c50f99507bee. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZFZ42523645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1be00e9ef422b63d135464b98276883b8696aabe18e87108d6bb50126d76e94. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:04:47Z), 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/QZES92507368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53d908480d65f0f08b2672949471fd680cdcb394021478b47ecc029ae725e2f. 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/QZES92507461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c1a248492b32fa9990221a17639bdaa08cd371f0b1c7eac1c31bc660dd43bf. 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/QZES92509588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7ad28943b6609b8282784a27515c2f25d110cd275f23ec7360e4810107ccef. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZHNA2549480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fac1b5578388c75d1460c597a9326d9aa1403f7bc6fff37f4190a5f3dcc7f47. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6Q2508767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810a95564f2cff873c92bdbbdd4c2644d6b6d4a166fd8d1a1663f775b84c0253. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6M2579759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99640f46e42f058ca0ad7f95473d67d9edcc154694eb0f8be6421a37576dab44. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6M2579761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3a60705feb3eb9992bd1ea3d2415a4ee4c9c5841a1e39beb381970f2592e70. 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/QZK6M2579762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738e125513278c170987128595851ab7c9e6822c28f1a662a44487c01f48894d. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZK6M2579763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d8a169aeb473434b3e9b4c94b3ec18aa1dbaca3836af12610144f9ef657229. 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/QZK6M2579767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d04991cd518f8020b1697a1640dd6f66da6f36440f0cb540e43eee20a147301. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:42:32Z), 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/QZK6M2579768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1a2dcc63e9403834eebd59896132009004522a32771fdadf097970be01e49e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZK6H2534484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c958c1524adf6769496aacaec7fb37cad6f022acb4e7ac56e95fdd18844254b. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZNWV2592581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c2d67227c97a773ca34400e011350500c2d19befc42e1d018fdd9a6425384b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:32:24Z), 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/QZTB32563640.