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 0xf22d0eef6911c2bfc31e1278fcf37fc41b193b907c12b340f71c993707fd3b31. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43cbd4d3-eb6a-46cc-bcab-c9c38c368502.json and https://artists.proofprofile.net/proofs/artist/43cbd4d3-eb6a-46cc-bcab-c9c38c368502.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 0x1ac4e08b5a16aa332280072bb1aad746cfe4add37a9e2ea28129a924318ac230. 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/QMDA61800760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc131ee3e2d5d870fc6acabd046a5c1fd7a68fc90a9406dc8580100d94e6de50. 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/QZTLA2218502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c3e1ab7220292f385cab368e47e0799e0151611dd5ede3a261d4765f2738de. 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/TCADW1865857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ed3b3de073f7a81b36469f3bcded68bbedb6931e15419f304fa81acb9059dd. 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/TCADW1865858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a535126f3064b011ee486238b62116fb740e99fce8d998e16603894c39e2022. 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/TCADW1865860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7f416bb85a3887f4f74104377be0b127ac69fb2ca080d45e06ce0865bcff8f. 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/TCADW1865864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa415699919b39bb4e27eef9f8a2b7dad082e45136c166414e844daad475acda6. 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/TCADW1865874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5f8b8914b33b1671805c28e9fe0ae8211bd76fc96f4246eee07ba1337486ab. 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/TCADW1874696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18877c7fb8c1c382209e1533ae9c83644108b0594121990a81f6dca431dbdbb2. 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/TCADW1874701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e190856ee35b38b0adab27c9db5f3d884d83d2ad1329f19c4b07d793395a1a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCADW1874704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e0a389d6ce4bd8ff2c253bc0dd8d0e44f2186440ede9a8dca28deb243e5e68. 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/TCADW1874706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712c47ec39c32c2d7b92e927c1f65a7d9b6c145d8b311bb2012eaed84602b7a6. 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/TCADW1874708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48fca457e5de352c2e57d70e617ef7a7460bdf7014269b6b61b0d64c89eeb67. 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/TCADW1874714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de550ddf7b1d403886913c930932c63e5f3fa9ec4ff01e3a8ab25c52d3c44bc. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/TCADW1874716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd80be6c9a1a0bdf562d30b9840c25825271569aca2d2f29447c3fa23c57c35e. 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/TCADW1874741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a6557142d175723e87a128cc64c6f070c0379d11616b61600845c9f47cc88c. 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/TCADW1874742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60653604972315f904a517de4fd304a9d4d1aa8712aa7bb8ca2fa96cc9539ddc. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZK6J2081332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea663147bf3779edc5d34704ba4ebef91d4e4359bb902cb15d27b447402d354. 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/QZFZ61922236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4edd6df3d5054e00e62c6ffb1a3de9ce25761b8b888476af2bdbdf13a1209c. 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/TCADN1841587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d91f77c67aa2d291bef709d40a7ed27483f11cbffe89a2ec0e8716669b2d08. 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/SE66N2370836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e14c83cf7163f9dfead7562868143fca04ed2a2b469c18557497d12cff6aa4. 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/SE6XX2325138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105174867b0a59399d9c38122d921f692726e64368b44aad7d389f15b809eed8. 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/SE62M2363320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac0f5d39f1fe630830e2d3566ec7b46c45c7c23029c7bdad5785a103b61d481. 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/SE62M2318956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb462db840add80d4721feb1bb4dc2420d547ab55592e30d5ba138c1648a05d8. 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/SE6A92390371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc4bad6c0d9808303a18846d793e52509cdb4a7b8fa8d58d716cf6a2607afc6. 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/SE6XX2317831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b09c0122620f4765d5769498f24e6981ff0c41a9b079ff64d0f6c5d3130940. 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/QMBZ91714998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91deef0f66db565347473c9c5b353ef20adcd74b0aad1696b9ce1dee3393e79. 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/QM3DF2158579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffb7ae186675a688721e9deb62518df089aaefe86a4be6bf3fb72a3310d016c. 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/QM3DF2158577.
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 0x34dd436068a059ce69b0066f4a6697a83b9af9ec488a01fbc05ff90583777da1. 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/QM4DW1868674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22afd3e05407943bf389e0dcd392d3219e9f6367a44b17cad09e33df3e664f5b. 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/QM4DW1863886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc2201a0e74210ac46185f1696fb5634bf1b2fcbe804c63a6a8fd3c5ed6b1d3. 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/SE5BU2441814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05db7f9d8fc2cb748ac1d2583515da410055b315231e58c1d277f3c2dcc8c5c9. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/SE5BU2441815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfaeecd3c5758ac884cad9a2f79c74882a87b36e51e1c298570b2fb85eb47de. 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/SE5BU2441821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1b094cee79e7644036bf380f59bcca9f0a46c1b2c2b552cf6558e0bc6edabd. 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/QZMER2390014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98ed8c4043a472100f6efdd0461784b19a76828e09279c9d9faff1e9db50f9f. 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/QZMER2390015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c90c952aa5d9fd33458a813f40ba46f01a3e1e520df2f27fea3a6b9008736e. 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/QZMER2390016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0ea1d469a087189627035ab8581aeaebd44f394937a988c850e06ba010cfa3. 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/QZMER2390019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab12ecf7533c54718f488fed8553e25f181f3cf3753d0839be16d8ab60c364a. 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/USCGJ2035275.