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 0xb1e10e71092057d947b0ea3fd36ae6f1df039b98fbb59173b5c7c10f20299967. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c51055e-5bd7-4070-b14b-956c0e85f9a3.json and https://artists.proofprofile.net/proofs/artist/7c51055e-5bd7-4070-b14b-956c0e85f9a3.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 0xe11bf35b3de88af8d6f4e5bbd8d410723bed1eddca733bc66d264608120bdff7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM24S1828653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2736a347869229684d999c421fec5191fb1c0dd5ae1f77ba753db41fcd12a3. 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/QM24S1828654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cbe2e7c5645d9ab4cacd14e4e43d7e8e572777b5955221a763d0e9c8f373d6. 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/QM24S1828655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac335d15d84b75434e73838b862cc835d71c5d4da1aaa2bb9c03b962824e0bde. 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/QM24S1828662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b63451bc8a50c99eb56cb514b7d33af58bb2ae64c2eac41ac7044d0cb498bab. 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/QM24S1828664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e47fb36d2532a7fb0cdc8c1a61c1183b23f2b3e7f30636d55da7a3f413bee6. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QM24S1828658.
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 0xfd42bc460fde110235a4e05d29cd560c9485b930072996ea6003fcbdf0839bf8. 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/QM24S1817931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a13a95d2a3b86a0b3f02c8336863bc49ce07d4f8f8ab673365d2b7885ff1b0. 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/QM24S1820710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3b4df1fb5d8f9a8ee5046665282ac7031c9f9ceb07b6ed95d58a9a9de056b5. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/QM24S1820711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400d4832d41b94ebd316680b38430bbf88be25bc04eecb89303a135b6e5b3fbc. 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/QM24S1820714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c762c964f8c75124530b2fe343e9db549ddf8c2b771964d6f317fd56c740ed. 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/QM24S1820715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf4f907f7ae1a108c34a83aea37646a4ffea687e568368e90f7561032f73ff9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM24S1820716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abf6123b4c9b51bc6110ffacd043ec472aa3bf82f998153d4299371f12cd60b. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/QM24S1820717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ca84a685a9ce7bcc0cf552c2a3773ae1e795e4f938478f6c7699db0fb98d0e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM24S1820720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb56510b9cb0c2b479f0e69d826cbf4b06250b2d6cabbf803df8a0485840bbd0. 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/QM24S1820722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a64719fea0dcee90d2dd6d0428ec547ab79ef0ed21df7d7de6d30756ce81c39. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QM24S1820723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208cdc0918d57b5ae2c06b71422ddd879b64aee0cc1744a59eeef8ca4d5edf5d. 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/QM24S1820731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170d6baa03c3ac4dac7a46ef71ab8795cf7b0b2c15f1895edd4c170f8bd53efe. 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/QM24S1820733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62823d0b99571099aa39345c1319979fd2b377fad9c4b7c403a1305ee98b0f6. 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/QM24S1820734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2135457281cd3e8e37997721a84de8f2643562479be596cf893c720ced750a. 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/QM24S1820737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb7a1a481ffbe11ec7927ec5245310e47364556cd08c2e5e909da16a3b2a359. 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/QM24S1820740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab34ba473776f5bcfbc09398cfc08961071325a5915f47cd32576d024de1998. 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/QM24S1820743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf776756e8f97aa05f5b5b198a34128f1f44f066d055992e76c7e54a140b1d35b. 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/QM24S1820745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624d4517963e256395c2ca62a1bf293000dcc92a76d5731aa1fde57f349eda84. 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/QM24S1820746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058b34cc2ecf817dbd4240fcf1fb6945199062a13ea4afc64e6d3142fdf7b007. 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/QM24S1820752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ac3ce99637e24ec1232e2686b60422ec6a5ebe21f3e5bebadd39e817c97011. 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/QM24S1820754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3df19db48a6c450ec98f78a3638ac4426e5f3e759965c7426ff0b5ac38432d. 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/QM24S1820757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c00f6e0fb09295558b1ec2095f4222b3d6ddf247c741e3e4df74fba41f15efd. 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/TCADQ1860907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91df4de85c3bf7b66826b84c9ef75c71f84dce0127e3c1b2981e7f9a67a97cf3. 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/TCADQ1860912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33727ed6b6609ad67851f89a16e5f88ffe91dfadc73773d88d8a1323d218fd66. 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/TCADQ1860914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c172585115ab0bb4d228d65e541ffd7f75904c0c5286b398e7ca57d0fbbbb32. 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/TCADQ1860916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd002ab69c4b452289d7ff07a2e1b2d2328200a568e752160d61ea1043c83cb06. 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/TCADQ1860910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2322846f6cf8fb40cabf9134ee93eb698516ab28541813eaaac54003da8f5b17. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZDA71822186.