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 0x214aa1ec7a91f90b3aa2df94a6ec205db54414cce913da38a20efbc68d933701. Chain 2 (Bitcoin): anchored in block 954069 (2026-06-17T08:30:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a445956-20d0-45de-84e1-18aee7fc9597.json and https://artists.proofprofile.net/proofs/artist/7a445956-20d0-45de-84e1-18aee7fc9597.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 0x86bb1b35c7e492237e756ff550f302913d8cda480d368d43b9bbbacf69a7428c. 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/UK6821803924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4800bf1411f623b4e63199ad9472fe1320d9e71fe17d967bc3a42ae754ca46. 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/UK6821653550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916b1dd23c007ffd3e23d7594bd7adb37fbe0e674f99cd82dbefc2fff4527610. 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/UK6821653552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb88dbd5ea4a3af98992f1d1a9e729c8a19bd20bdd1a02de03f77e427ad5c1a4. 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/UK6821653556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6a9b6da972afe181585dc56b8e8f82b2c5ce02d2254c6a3b7f613828870766. 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/UK6821653557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1137dd95c954775cac27f5f1f97a726373d77293b3811b3ad4e6fbf1c9770864. 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/UK6821653559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8d66da14de3be2120f1a88b054aa0509f825aa88eec96df9eb55d0c4b6fdd4. 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/UK6821653561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0de3b4a67181f00d42cf0a86adcfbe0e9960a5b26310ccfa5dafa83a1a6025d. 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/UK6821653564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6614d5a89225435a6b67d615e1cbf991b87548e6ac62727b80e9b16c5b8462. 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/UK6821653565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37600b3ebbea38f46967bb4bd0489313afd94e6bcc4b1fe55fd33158dc1ae983. 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/UK6821653566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012008481f79a0b2318904f756f7fe6696e6358a3733def5f5b130b64953d988. 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/UK6821653567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefca99b2a8d6529f5381f0439189c41d487458dc214637d3f08e878bffae4d3. 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/UK6821653568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded6325a4cecd080a0397b2c0ed99f00334254ce0e5997c46a5b059b3afa36b1. 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/UK6821653575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88453ed4d826f587dcc175ae2d946f25444f491835591d4dc4a338c8e6c9194. 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/UK6821653578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7561a274b08613bb521a1f06e6e86139e401f8cf55d7b051176aa4a753c6271. 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/UK6821653579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a13af3145e3cf5634f807ed23f6b0ab84484b60c801d9584d351a464f56f00. 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/UK6821653580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e12f65fa3e26f50bec5e06af5fc0d6a00db1c25d9ff8414ab342d96fe03247. 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/UK6821653583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47dd3bd620364cd941bd0f4cbc9934b8bbd7244a3601011f65cbb5ddf19e50b. 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/UK6821653588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd0828f931afdb3d2ee375f947bf2108b1668c4527adde8d34be38f3d0eb3f5. 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/UK6821653589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0439729ebb54e945dfdd2d94fb8b7be10504db22356470e74937951c4ab518. 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/UK6821653593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b2d034e751d3e68afa944ac8300b42875f33f6a908cc7a913d087d5d27ef59. 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/UK6821653595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1c61143b347c25fdbcf042611c5ecffb99b5dda47be68908284bed5049e96a. 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/UK6821803902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50bc9cd06ed76456bfa09531800c9088a476606441d90c9ed0c79626857dab3. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/UK6821653577.
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 0xf60870b478caaa4513b24f4eb74cc30ec6df0f2e00554538f313666437429a8d. 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/QZFP51932558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa041018dd6879757a3ce2d5c31398d7ed60442b0aa3208da2a76b495cd969546. 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/QZFP51946336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7baf76bf66ecc7e6cd989acc0e1d0f9b19452ac1c6d21a57b39d801f8fc4fdd4. 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/UK6821653541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655b6d91b9a77a0b6a5441ff4c4210487ff49488573c71d513316fbee60a2ba9. 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/UK6821653545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e555c954bd9adeaebc67eb8fc4a478f99bb9ee04563302b1c69f3aca19eddc0. 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/CAGOO2026723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddb97bbc47d41c4194c1da4d3de307633f40ee4728ae720d96a92597edabf45. 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/CAGOO2026726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba3fcaf2366e9d6c35d5a1e19e47ed152612e209eb21b1ae39a96e826eef047. 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/CAENV2275658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc4f89a90a1d8713180a460745a2e8c2bf95c3aa6d85c1c9ac7c9fa7fa9f8d8. 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/CAENV2275677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364032d6c772f35370a85a741727bc8db4b00f468c7e19cf59ed68ac8ac667d0. 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/CAENV2275659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6190ca44a9f0c21d126c812969a7a1fa94e650aec43051a40ecb24dc8f5ea3. 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/CACWV2305440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f28da602e1345de4108abeab9f3801708e5def07d804ff9576b6e416a9f47b. 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/CACWV2305437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2423938ab97992eda7511e5256eb4df251bf0beff7f4e75626373d759ddd562. 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/CACWV2305452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4f9a9e556011c272e37a86bc3cd0b3ec79fe89edd94729d396f03b43f5fe23. 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/CACWV2305454.