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 0xb408883d6e85ac52852ac841424acfae5263bce709e4c210affe813473abba7c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2293f737-4291-4e35-a37c-edb45abe9584.json and https://artists.proofprofile.net/proofs/artist/2293f737-4291-4e35-a37c-edb45abe9584.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 0x682759165140e0d89588e2bbd1ca423c3c1f2cfcef7ccdf45ea44d5d8d95ccd9. 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/USL4Q1761114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a62ede1306bb3d433e98b6b5a0b4f31c816831d7e09609429eddb49ae4f484. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:35:35Z), 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/USL4Q1761116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc292f145166c770494e35a4f9a600d72c568a44011cbadb5abed4b85959b06f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USL4Q1761118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e7950f87f49ed9bb62ed509e605b40d6f8d5456a287f8bc7d070c3081b8ff6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USL4Q1761120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7564a86335d6d5e1290df4d504a10e74aec2dc52dfb7b454f1b654f61b505a4b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USL4Q1761125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1235473a2b4d684be24c5980cd4d2659fa4d2286ae6a7fd04c947af7e6ab0db5. 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/USL4Q1761128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fe8adf55848094ca1c0dfee97499385c9fbd3439e89cfefb9bbce872681bc3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USL4Q1761129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2ec07b34bffae1c4ab30bf8a266c0b63050961d0b13b6f8d68f1933e505134. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USL4Q1761130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d51fff05585375e183c2cee7723a86499cfeb9ef7b241ed2585e7e69d5c021e. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/USL4Q1761132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630b547ba0b2344d1e8b9fa4b23583d9de46aeb87d8105d8ba700560498f58b5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USL4Q1761138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6afd6a82838025d58c6c5fb0ea2a692a5e4845185d726de58619c2239c03d2. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/USL4Q1802600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e62a5b7891ff83289750259e421f7d2e5699077dee4ed65df4a2e2d91a9ded3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:37:12Z), 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/USL4Q1802602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239c3da060d583fd676e26c123c4836e8e5201b763d3600a7019cf14a525a346. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USL4Q1802606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8e59d461494ae012b674a874416c7b28cb6fb09cb52c664201ca0971266b34. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/USL4Q1802611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1108cc069d59b279ae53d68cd72586d3f0d5ca00ae419f02b2f2dc3f58e617. 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/USL4Q1802613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e87526ec8d3feb7c1162eda11d2db4e1da8ebf3a9380916ea9020fff0d08b6a. 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/USL4Q1802614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85f63d91b3020682a146f0c96081d47a5d391c53d870d1fa6aef80b2f375306. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/USL4Q1802615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a159d0c8267c804ebff544fa2461b0f358fe16eeca95d00c872ba5903126e6a. 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/USL4Q1802617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d40f7600fdbdd5376753d40aa401d4254ec4307e03f4ec848739a7db46e0d21. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/USL4Q1810845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743eca116724248e268a56e44f592c8076226c5d0ba7a8ff56a98b19290dc405. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USL4Q1810848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49937c5ddea9dadd82b98fe920feda5ac9b6d6f73f1e6f5b835a2971617b18d7. 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/USL4Q1810855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafa6ec772e2ddaee26a1ee5432a875a8cd687248880a4671c74ae790a65d231. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USL4Q1810856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050a8cc3b78491d809c3783de0d69e6af90e2c6227e67471cfd908e6817f2673. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USL4Q1802636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e7c6701c69d4833c88c4c9df0364f1317aecde0505220e8a4f343addd42925. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:29:33Z), 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/USL4Q1800412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5055db3a19bf6e9df41dfd58fc0ad944f61de2c80530965c0a833e55d30d4778. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USL4Q1800430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a362c0b749f5c818118cdb156985eb0fcae788b6fdb2db37ec5ec0a80fe026. 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/USL4Q1800369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2270bfa7a73f1a2123753cae936902826c30da4ba33e4a6657e67ded46a3be5. 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/USL4Q1800373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0571968b14a3626fd5aa3e1538768f5e865dec126b18c486e062d00a108c4e8. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:01:48Z), 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/USL4Q1800377.